Adds checks throughout to allow for `wp_new_comment()` returning a `WP_Error` instance.
Updates the docs for the `pre_comment_approved` filter to include that it can be passed an error.
Props enrico.sorcinelli, ryotsun.
Fixes#39730.
Built from https://develop.svn.wordpress.org/trunk@41980
git-svn-id: http://core.svn.wordpress.org/trunk@41814 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Reverting this for 4.9. It will be added back in a future version of WordPress. This doesn't mean that you shouldn't be trying Gutenberg, just that it isn't ready for a call out to a larger audience. But if you are the type to read commit messages, https://github.com/WordPress/gutenberg could use your pull requests and comments on issues.
Reverts [41931] [41900] [41896] [41895]
See #41316
Built from https://develop.svn.wordpress.org/trunk@41978
git-svn-id: http://core.svn.wordpress.org/trunk@41812 1a063a9b-81f0-0310-95a4-ce76da25c4cd
The customizer and the theme installer use `visibility: hidden` on the body when
they open full-overlays screens. The FTP credentials modal needs a visibility
property set back to `visible` to be visible over those overlays.
Props purnendu.
Fixes#42205.
Built from https://develop.svn.wordpress.org/trunk@41972
git-svn-id: http://core.svn.wordpress.org/trunk@41806 1a063a9b-81f0-0310-95a4-ce76da25c4cd
When media is uploaded to a post, the upload directory is set according to the date of the post, so that the media URLs in the post match when the post was published.
A page is a slightly different beast, pages often live for years, and are regularly updated to stay relevant. This change causes media uploaded to pages to use the upload date to determine the upload directory.
Fixes#10752.
Built from https://develop.svn.wordpress.org/trunk@41964
git-svn-id: http://core.svn.wordpress.org/trunk@41798 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Update the `CodeEditorControl`'s `codemirror` deferred to be set before calling the parent class's `initialize` method. Since the `ready` method may be called directly by `initialize` it may be too late to add a new `Deferred` to the control's `deferred` property after calling the base control class's `initialize`.
Amends [41958].
See #41897.
Built from https://develop.svn.wordpress.org/trunk@41960
git-svn-id: http://core.svn.wordpress.org/trunk@41794 1a063a9b-81f0-0310-95a4-ce76da25c4cd
CodeMirror gets initialized once the control's containing section is expanded. The deferred will be rejected if user preference for syntax highlighting is disabled.
Also move jsdoc from `wp.customize.Control` to intended `wp.customize.Control#initialize()`.
See #41897, #12423.
Built from https://develop.svn.wordpress.org/trunk@41958
git-svn-id: http://core.svn.wordpress.org/trunk@41792 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Allow `CodeEditorControl` to be instantiated with a `editor_settings` param which is merged with `wp.codeEditor.defaultSettings`.
Also:
* Turn redundant "CSS Code" control label into screen reader text for Additional CSS.
* Remove `code-editor` as script dependency for `custom-html-widgets` since enqueueing is determined by `wp_enqueue_code_editor()`.
* Remove useless exporting of `code_type` param to JS in `WP_Customize_Code_Editor_Control`.
* Add `disabled` class to Custom HTML widget's Save button when linting errors are present.
* Remove redundant `span` inside CodeEditorControl's `label`.
See #41897, #12423, #41872.
Built from https://develop.svn.wordpress.org/trunk@41957
git-svn-id: http://core.svn.wordpress.org/trunk@41791 1a063a9b-81f0-0310-95a4-ce76da25c4cd
* Introduce a `widget_{$id_base}_instance_schema` filter for plugins to add new properties to a media widget's instance schema.
* Pass all of a gallery widget's instance props to the gallery media frame, not just the ones that core supports.
See #32417, #41914.
Fixes#42285.
Built from https://develop.svn.wordpress.org/trunk@41951
git-svn-id: http://core.svn.wordpress.org/trunk@41785 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This is a follow up on r41732, implementing the following improvements:
* Attachment parent info is now stored in attachment meta rather than a
separate post meta key.
* Attachments created from contextual crops (e.g. header, logos, etc.) are
filtered out of the media library using a new `_filterContext` method in
`wp.media.controller.Library`.
Props joemcgill, westonruter.
See #21819.
Built from https://develop.svn.wordpress.org/trunk@41937
git-svn-id: http://core.svn.wordpress.org/trunk@41771 1a063a9b-81f0-0310-95a4-ce76da25c4cd
* Only use default control content template when a more specific template doesn't exist.
* Remove extraneous whitespace from being output in `WP_Customize_Control::render()` method.
* Move Custom Header template printing to `customize_controls_print_footer_scripts` action.
See #30738.
Built from https://develop.svn.wordpress.org/trunk@41935
git-svn-id: http://core.svn.wordpress.org/trunk@41769 1a063a9b-81f0-0310-95a4-ce76da25c4cd
* Update deprecated `isHostedVideo` method to always return `true` since all oEmbeds are now supported.
* Disable `scanImage` for non-image media widgets.
* Ensure embed URL field element is matched from current media frame instance due to bug where media frames are not destroyed upon closing.
* Update error message for invalid video URLs to ask user to check the URL for validity.
Props gk.loveweb, octalmage, westonruter.
See #42039, #40935.
Fixes#41052.
Built from https://develop.svn.wordpress.org/trunk@41933
git-svn-id: http://core.svn.wordpress.org/trunk@41767 1a063a9b-81f0-0310-95a4-ce76da25c4cd
* Update stubs to have draft status when changeset is saved as draft, instead of preventing auto-draft garbage collection by giving them a far-future `post_date`.
* Show notice in publish metabox when editing a customization draft indicating that it will be published automatically with its changeset; a link to Customizer is included.
* Include a new "Customization Draft" display post state in the post list table.
* Disconnect stubs from their changesets when they are updated with a status other than "Draft".
* Trash customization drafts when their related changeset is trashed or deleted.
* Add a `_customize_changeset_uuid` postmeta to stubs to link them with their associated changeset.
* Include `customize_changeset_uuid` as context when requesting to insert a new auto-draft.
Props westonruter, melchoyce.
See #39896, #39752, #34923.
Fixes#42220.
Built from https://develop.svn.wordpress.org/trunk@41887
git-svn-id: http://core.svn.wordpress.org/trunk@41721 1a063a9b-81f0-0310-95a4-ce76da25c4cd
The warning displayed upon first visit on the File Editors introduced in [41774]
needs to be the only perceivable content in the page for users of assistive
technologies. It looks like a modal but it's not exactly an ARIA dialog, not an
ARIA alert either, and needs some special treatment.
- constrains tabbing within the modal
- uses `wp.a11y.speak()` to make screen readers announce the modal message
- hides all the other page content from assistive technologies using `aria-hidden="true"`
This way, even if users miss the speak message, the warning is actually the only
perceivable content in the page.
Fixes#42110.
Built from https://develop.svn.wordpress.org/trunk@41876
git-svn-id: http://core.svn.wordpress.org/trunk@41710 1a063a9b-81f0-0310-95a4-ce76da25c4cd
* Update date control padding.
* Collapse publish settings section when opening panes for available widgets or nav menus.
* Remove save and cog buttons in mobile preview only mode.
* Move definition of `wp.customize.previewedDevice` to `wp.customize.state('previewedDevice')` for centralization, maintaining old alias.
* Remove unused CSS because the section is inside form now.
Props sayedwp, westonruter.
See #39896.
Fixes#42027, #42199.
Built from https://develop.svn.wordpress.org/trunk@41860
git-svn-id: http://core.svn.wordpress.org/trunk@41694 1a063a9b-81f0-0310-95a4-ce76da25c4cd
* Customization locking is checked when changesets are saved and when heartbeat ticks.
* Lock is lifted immediately upon a user closing the Customizer.
* Heartbeat is introduced into Customizer.
* Changes made to user after it was locked by another user are stored as an autosave revision for restoration.
* Lock notification displays link to preview the other user's changes on the frontend.
* A user loading a locked Customizer changeset will be presented with an option to take over.
* Autosave revisions attached to a published changeset are converted into auto-drafts so that they will be presented to users for restoration.
* Focus constraining is improved in overlay notifications.
* Escape key is stopped from propagating in overlay notifications, and it dismisses dismissible overlay notifications.
* Introduces `changesetLocked` state which is used to disable the Save button and suppress the AYS dialog when leaving the Customizer.
* Fixes bug where users could be presented with each other's autosave revisions.
Props sayedwp, westonruter, melchoyce.
See #31436, #31897, #39896.
Fixes#42024.
Built from https://develop.svn.wordpress.org/trunk@41839
git-svn-id: http://core.svn.wordpress.org/trunk@41673 1a063a9b-81f0-0310-95a4-ce76da25c4cd
On narrower devices, input fields are too short to fit the number of default digits they contain. This widens the fields and also breaks each height and width attribute onto a new line for better usability, using some terrible CSS trickery. My apologies.
Props: Toru, Presskopp, desrosj, xkon, ryelle, melchoyce.
Fixes#34539.
Built from https://develop.svn.wordpress.org/trunk@41836
git-svn-id: http://core.svn.wordpress.org/trunk@41670 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Fixes an issue where hovering over the warning icon didn't work if there were multiple warnings on the same line of code. Also updates the cursor from "pointer" to "help" when hovering over warnings and errors.
Props joyously, obenland.
Fixes#42129.
Built from https://develop.svn.wordpress.org/trunk@41830
git-svn-id: http://core.svn.wordpress.org/trunk@41664 1a063a9b-81f0-0310-95a4-ce76da25c4cd
* Introduce `WP_Customize_Themes_Section::$filter_type`, which has built-in functionality for `local` and `remote` filtering. When this set to `local`, all themes are assumed to be loaded from Ajax when the section is first loaded, and subsequent searching/filtering is applied to the loaded collection of themes within the section. This is how the core "Installed" section behaves - third-party sources with limited numbers of themes may consider leveraging this implementation. When this is set to `remote`, searching and filtering always triggers a new remote query via Ajax. The core "WordPress.org" section uses this approach, as it has over 5000 themes to search.
* Refactor `filterSearch()` to accept a raw term string as input. This enables a feature filter to be used on a section where `filter_type` is `local`.
* Refactor `filter()` on a theme control to check for an array of terms. Also sort the results by the number of matches. Rather than searching for an exact match, this will now search for each word in a search distinctly, allowing things like tags to rank in search results more accurately.
* Split `loadControls()` into two functions for themes section JS: `loadThemes()` to initiate and manage an Ajax request and `loadControls()` to create theme controls based on the results of the Ajax call. If third-party sections need to change the way controls are loaded, such as by using a custom control subclass of `WP_Customize_Theme_Control`, this allows them to use the core logic for managing the Ajax call and only override the actual control-creation process.
* Introduce `customize_load_themes` filter to facilitate loading themes from third-party sources (or modifying the results of the core sections).
* Bring significant improvements to the installed themes search filter.
Props celloexpressions.
Amends [41648].
See #37661.
Fixes#42049.
Built from https://develop.svn.wordpress.org/trunk@41807
git-svn-id: http://core.svn.wordpress.org/trunk@41641 1a063a9b-81f0-0310-95a4-ce76da25c4cd
The theme and plugin editors now list all files in the selected theme or plugin, recursing through subdirectories as necessary.
Props WraithKenny, schlessera, chsxf, MikeHansenMe, Daedalon, valendesigns, westonruter, pento.
Fixes#6531.
Built from https://develop.svn.wordpress.org/trunk@41806
git-svn-id: http://core.svn.wordpress.org/trunk@41640 1a063a9b-81f0-0310-95a4-ce76da25c4cd
* Increase PHP execution time limit prior to issuing loopback requests where are themselves given timeouts to ensure PHP file can be reverted.
* Output scrape messages on success and failure so that absence of either can also be flagged as an error condition.
* Forward browser's HTTP Basic Auth credentials in loopback requests to admin and home URL.
* Display more helpful message when loopback request fails.
Amends [41721].
See #21622.
Fixes#42102.
Built from https://develop.svn.wordpress.org/trunk@41805
git-svn-id: http://core.svn.wordpress.org/trunk@41639 1a063a9b-81f0-0310-95a4-ce76da25c4cd
* Open the door for future browser history feature in #28536, which is currently not feasible when customize-loader is used.
* Remove customizer-loader from being used on admin screens for Dashboard, Themes, non-shiny theme install/update.
* Keep the customize-loader functionality available for plugins, for the time being. It may become deprecated.
* Ensure `return` param in customizer links in Themes screen update to reflect `search` updated by `pushState`.
* Persist `return` when reloading Customizer due to theme switch, autosave restoration, or changeset trashing.
* Use `location.replace()` instead of changing `location.href` when trashing.
* Hide theme browser while Themes screen is loading when there is a `search` to prevent flash of unfiltered themes.
* Use throttling instead of debouncing when searching themes to ensure that screen is updated immediately on page load.
* Fix encoding and decoding of `search` param between URL and search field.
* Add support for dismissing autosaves when closing customize-loader, when it is used by plugins.
* Skip sending changeset UUID to customize-loader for population in browser location if changeset branching is not enabled.
See #28536.
Fixes#40254.
Built from https://develop.svn.wordpress.org/trunk@41797
git-svn-id: http://core.svn.wordpress.org/trunk@41631 1a063a9b-81f0-0310-95a4-ce76da25c4cd
* Prevent autoloading an existing draft/future changeset when theme not active.
* Add missing notifications container to Themes panel.
* Remove deactivation of themes panel when selected status is not publish.
* Show notification in Themes panel when themes cannot be previewed and disable preview buttons.
* Reject installTheme call when theme preview not available.
* Return promise from installTheme and eliminate use of global events in favor of promises.
Props westonruter, melchoyce, zoonini.
See #37661, #39896.
Fixes#42126.
Built from https://develop.svn.wordpress.org/trunk@41788
git-svn-id: http://core.svn.wordpress.org/trunk@41622 1a063a9b-81f0-0310-95a4-ce76da25c4cd
- Fix keeping text selection and scroll position when there are embeds from URL.
- Add editor setting to disable keeping selection and scroll position.
- Remove dependency on Underscore.js.
- Fix error in the Text widget editor.
Props biskobe.
Fixes#42059, see #40854.
Built from https://develop.svn.wordpress.org/trunk@41783
git-svn-id: http://core.svn.wordpress.org/trunk@41617 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This is an effort to provide a speed bump before heading into something potentially destructive and some education for users on better alternatives, even as we make the file editors safer to use. Each user, including existing users, will be shown a one-time dismissible modal warning on their first visit to each of the theme and plugin file editors.
Copy tweaks to come.
props michelleweber, Ipstenu, melchoyce, adamsilverstein, westonruter, toddnestor, aryamaaru, ZaneMatthew, cliffseal, helen.
fixes#31779.
Built from https://develop.svn.wordpress.org/trunk@41774
git-svn-id: http://core.svn.wordpress.org/trunk@41608 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Often, folks run into two issues when they create new menus: they click "Add a Menu" thinking it will add a new page to their menu, or they forget to assign their new menu to a location, and then wonder why it doesn't show up on their site.
This commit rearranges the order of items in the menu panel, and updates the flow for creating a menu by breaking it up into steps. Additionally, more help text has been added to guide people through the process of creating a menu.
Also adds default `type` lookups for Panel and Section instances. See #30741.
Props bpayton, obenland, westonruter, celloexpessions, afercia, melchoyce, zoonini, michelleweber.
Fixes#40104.
Built from https://develop.svn.wordpress.org/trunk@41768
git-svn-id: http://core.svn.wordpress.org/trunk@41602 1a063a9b-81f0-0310-95a4-ce76da25c4cd
- Remove plugins icons from the plugin list table, as there were performance issues loading the icons when the site had lots of plugins.
- Depending on which icons the plugin has uploaded, prefer them in this order: `svg`, `128x128`, `256x256`.
- Improve the style of the fallback icon for plugins that don't have an icon defined.
Props Travel_girl, danieltj, afercia, karmatosed,hugobaeta, empireoflight, brentjett, melchoyce, pento.
Fixes#30186.
Built from https://develop.svn.wordpress.org/trunk@41755
git-svn-id: http://core.svn.wordpress.org/trunk@41589 1a063a9b-81f0-0310-95a4-ce76da25c4cd
* Allow passing settings in keyed object (e.g. `settings: { default: 'id' } ), or as an array (e.g. `settings: [ 'id' ]`) with first being default; again, `Setting`/`Value` objects may be supplied instead of IDs.
* Allow a single setting to be supplied with just a single `setting` param, either a string or a `Setting`/`Value` object.
* Update `changeset_status` and `scheduled_changeset_date` to be added dynamically with JS and simply passing of `api.state()` instances as `setting`.
* Introduce a `data-customize-setting-key-link` attribute which, unlike `data-customize-setting-link`, allows passing the setting key (e.g. `default`) as opposed to the setting ID.
* Allow `WP_Customize_Control::get_link()` to return `data-customize-setting-key-link` when setting is not registered.
* Eliminate `default_value` from `WP_Customize_Date_Time_Control` since now comes from supplied `Value`.
* Export status choices as `wp.customize.settings.changeset.statusChoices`.
* Export date and time formats as `wp.customize.settings.dateFormat` and `wp.customize.settings.timeFormat` respectively.
Props westonruter, sayedwp.
See #39896, #30738, #30741, #42083.
Fixes#37964, #36167.
Built from https://develop.svn.wordpress.org/trunk@41750
git-svn-id: http://core.svn.wordpress.org/trunk@41584 1a063a9b-81f0-0310-95a4-ce76da25c4cd
When able to be parsed, store the created date for a video file from meta,
since this is useful separately from the dates on the file itself.
Introduces `wp_get_media_creation_timestamp()` to read the timestamp from
getID3 and a `wp_read_video_metadata` filter analogous to
`wp_read_image_metadata`.
Fixes#35218.
Props stevegrunwell, joemcgill, desrosj, blobfolio, mikeschroder.
Built from https://develop.svn.wordpress.org/trunk@41746
git-svn-id: http://core.svn.wordpress.org/trunk@41580 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This sets a referrer policy of `same-origin` which adds hardening by preventing a referrer being sent from the admin area or login screens to other origins. This helps prevent unwanted exposure of potentially sensitive information that may be contained within URLs.
This change introduces a new filter, `admin_referrer_policy`, for filtering the referrer policy header value. The header can be disabled if necessary by removing the `wp_admin_headers` action from the `admin_init` and `login_init` hooks.
Props joostdevalk
Fixes#42036
Built from https://develop.svn.wordpress.org/trunk@41741
git-svn-id: http://core.svn.wordpress.org/trunk@41575 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This adds `Custom_Image_Header::get_previous_crop()`, which finds any
previously cropped headers created from the same base image and replaces
that attachment rather than creating a new attachment.
After updating a crop, the replaced images is also removed from the list
of previous header images in the Customizer.
See #21819.
Built from https://develop.svn.wordpress.org/trunk@41732
git-svn-id: http://core.svn.wordpress.org/trunk@41566 1a063a9b-81f0-0310-95a4-ce76da25c4cd
* Eliminate need to pass both ID and instance in calls to `Values#add()` for panels, sections, controls, settings, partials, and notifications.
* Eliminate need to supply `content` param when constructing a `Control`.
* Unwrap the `options.params` object passed in constructors to just pass a flat `options`. (Back-compat is maintained.)
* Add support for `templateId` param for `Control` to override which template is used for the content.
* Remove unused `previewer` being supplied in `Control` instances.
* Rename `classes` to `containerClasses` on `Notification`.
* Automatically supply `instanceNumber` to improve stable sorting.
* Use `api.Notifications` for notifications in settings instead of `api.Value`.
See #30741.
Fixes#42083.
Built from https://develop.svn.wordpress.org/trunk@41726
git-svn-id: http://core.svn.wordpress.org/trunk@41560 1a063a9b-81f0-0310-95a4-ce76da25c4cd
* Edits to active plugins which cause PHP fatal errors will no longer auto-deactivate the plugin. Supersedes #39766.
* Introduce sandboxed PHP file edits for active themes, preventing accidental whitescreening of a user's site when introducing a fatal error.
* After writing a change to a PHP file for an active theme or plugin, perform loopback requests on the file editor admin screens and the homepage to check for fatal errors. If a fatal error is encountered, roll back the edited file and display the error to the user to fix and try again.
* Introduce a secure way to scrape PHP fatal errors from a site via `wp_start_scraping_edited_file_errors()` and `wp_finalize_scraping_edited_file_errors()`.
* Moves file modifications from `theme-editor.php` and `plugin-editor.php` to common `wp_edit_theme_plugin_file()` function.
* Refactor themes and plugin editors to submit file changes via Ajax instead of doing full page refreshes when JS is available.
* Use `get` method for theme/plugin dropdowns.
* Improve styling of plugin editors, including width of plugin/theme dropdowns.
* Improve notices API for theme/plugin editor JS component.
* Strip common base directory from plugin file list. See #24048.
* Factor out functions to list editable file types in `wp_get_theme_file_editable_extensions()` and `wp_get_plugin_file_editable_extensions()`.
* Scroll to line in editor that has linting error when attempting to save. See #41886.
* Add checkbox to dismiss lint errors to proceed with saving. See #41887.
* Only style the Update File button as disabled instead of actually disabling it for accessibility reasons.
* Ensure that value from CodeMirror is used instead of `textarea` when CodeMirror is present.
* Add "Are you sure?" check when leaving editor when there are unsaved changes.
Supersedes [41560].
See #39766, #24048, #41886.
Props westonruter, Clorith, melchoyce, johnbillion, jjj, jdgrimes, azaozz.
Fixes#21622, #41887.
Built from https://develop.svn.wordpress.org/trunk@41721
git-svn-id: http://core.svn.wordpress.org/trunk@41555 1a063a9b-81f0-0310-95a4-ce76da25c4cd
- fixes invalid HTML and duplicate IDs
- as per the Accessibility coding standards, all new code must use explicitly associated form labels
- properly escapes a few HTML attributes
Props celloexpressions, afercia.
Fixes#42054.
Built from https://develop.svn.wordpress.org/trunk@41709
git-svn-id: http://core.svn.wordpress.org/trunk@41543 1a063a9b-81f0-0310-95a4-ce76da25c4cd
To mirror theme list table behaviour, the plugin icon now appears next to plugins in the plugin list tables. For plugins that don't have an icon, or non-W.org plugins, a fallback dashicon is shown.
Props melchoyce, afercia, paulwilde, pento, obenland.
Fixes#30186.
Built from https://develop.svn.wordpress.org/trunk@41695
git-svn-id: http://core.svn.wordpress.org/trunk@41529 1a063a9b-81f0-0310-95a4-ce76da25c4cd
The `aria-current` attribute is a simple, effective way to help assistive
technologies users orientate themselves within a list of items. Continues the
introduction in core of the `aria-current` attribute after [41359] and [41371].
Props joedolson, flixos90, afercia.
Fixes#32399.
Built from https://develop.svn.wordpress.org/trunk@41683
git-svn-id: http://core.svn.wordpress.org/trunk@41517 1a063a9b-81f0-0310-95a4-ce76da25c4cd
* Let date `legend` be screen reader text when time is not included.
* Skip rendering containers for label (title) and description when not supplied in registered control.
* Fix margins and padding.
Amends [41670].
Props westonruter, afercia, sayedwp.
Fixes#42022.
Built from https://develop.svn.wordpress.org/trunk@41672
git-svn-id: http://core.svn.wordpress.org/trunk@41506 1a063a9b-81f0-0310-95a4-ce76da25c4cd
* Allow time fields to be omitted by constructing with `timeIncluded` as `false`.
* Ensure `reportValidity` is only called on a control when it is in an expanded section.
* Rename "ampm" to "meridian".
* Improve accessibility and fix HTML validation and style issues for both the date/time control and the preview link control.
* Fix styling of dropdowns and clean CSS.
* Improve accessibility of nav menus component.
Props westonruter, afercia, sayedwp, melchoyce.
Amends [41626].
See #39896.
Fixes#42022.
Built from https://develop.svn.wordpress.org/trunk@41670
git-svn-id: http://core.svn.wordpress.org/trunk@41504 1a063a9b-81f0-0310-95a4-ce76da25c4cd
* Introduce a new `wp.customize.previewer.trash()` JS API to trash the current changeset, along with logic to `WP_Customize_Manager` to handle deleting changeset drafts.
* Add `trashing` to `wp.customize.state` which is then used to update the UI.
* UI for trashing is pending design feedback. One possibility is to add a new trash button to Publish Settings section that invokes `wp.customize.previewer.trash()`.
* Improve logic for managing the visibility and disabled states for publish buttons.
* Prevent attempting `requestChangesetUpdate` while processing and bump processing while doing `save`.
* Update `changeset_date` state only if sent in save response.
* Merge `ThemesSection#loadThemePreview()` into `ThemesPanel#loadThemePreview()`.
* Remove unused `autosaved` state.
* Start autosaving and prompting at beforeunload after a change first happens. This is key for theme previews since even if a user did not make any changes, there were still dirty settings which would get stored in an auto-draft unexpectedly.
* Allow `Notification` to accept additional `classes` to be added to `container`.
* Introduce `OverlayNotification` and use for theme installing, previewing, and trashing. Such overlay notifications take over the entire window.
Props westonruter, celloexpressions.
See #37661, #39896, #21666, #35210.
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`get_current_blog_id()` is more appropriate for determining the ID of the current site in most cases. This eliminates the need for the global `$wpdb` in several functions and is better than the implicit global used in admin pages.
Props bnap00, spacedmonkey.
Fixes#41684.
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- sets the modal content to `role="document"` to make screen readers switch back to browse mode
- standardizes the Themes screen and Customizer modals interaction
- Themes screen modal: sets initial focus on the modal overlay instead of the primary button, avoiding to "skip" content for keyboard and screen reader users
Fixes#42055.
Built from https://develop.svn.wordpress.org/trunk@41658
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