* Adds a `notifications` property to instances of `wp.customize.Panel` and `wp.customize.Section`.
* Adds a `setupNotifications()` method to `Panel`, `Section`, and `Control`.
* Adds a `getNotificationsContainerElement()` method to the `Panel` and `Section` classes, like `Control` has.
* Replace hard-coded notification in header media section with a notification.
* Limit rendering notifications to panels and sections that are expanded, and to controls that have an expanded section.
See #34893, #35210, #38778.
Fixes#38794.
Built from https://develop.svn.wordpress.org/trunk@41390
git-svn-id: http://core.svn.wordpress.org/trunk@41223 1a063a9b-81f0-0310-95a4-ce76da25c4cd
* Show global error notiafication when saving is blocked due to client-side setting invalidity.
* Refactor `wp.customize.Notifications#render()` to ensure a notification re-renders if its `message` or data changes but its `code` does not.
Props MatheusGimenez, sixhours, westonruter, karmatosed, aocean90, zoonini, michelleweber, melchoyce.
See #35210.
Fixes#21492.
Built from https://develop.svn.wordpress.org/trunk@41389
git-svn-id: http://core.svn.wordpress.org/trunk@41222 1a063a9b-81f0-0310-95a4-ce76da25c4cd
* Code editor is integrated into the Theme/Plugin Editor, Additional CSS in Customizer, and Custom HTML widget. Code editor is not yet integrated into the post editor, and it may not be until accessibility concerns are addressed.
* The CodeMirror component in the Custom HTML widget is integrated in a similar way to TinyMCE being integrated into the Text widget, adopting the same approach for integrating dynamic JavaScript-initialized fields.
* Linting is performed for JS, CSS, HTML, and JSON via JSHint, CSSLint, HTMLHint, and JSONLint respectively. Linting is not yet supported for PHP.
* When user lacks `unfiltered_html` the capability, the Custom HTML widget will report any Kses-invalid elements and attributes as errors via a custom Kses rule for HTMLHint.
* When linting errors are detected, the user will be prevented from saving the code until the errors are fixed, reducing instances of broken websites.
* The placeholder value is removed from Custom CSS in favor of a fleshed-out section description which now auto-expands when the CSS field is empty. See #39892.
* The CodeMirror library is included as `wp.CodeMirror` to prevent conflicts with any existing `CodeMirror` global.
* An `wp.codeEditor.initialize()` API in JS is provided to convert a `textarea` into CodeMirror, with a `wp_enqueue_code_editor()` function in PHP to manage enqueueing the assets and settings needed to edit a given type of code.
* A user preference is added to manage whether or not "syntax highlighting" is enabled. The feature is opt-out, being enabled by default.
* Allowed file extensions in the theme and plugin editors have been updated to include formats which CodeMirror has modes for: `conf`, `css`, `diff`, `patch`, `html`, `htm`, `http`, `js`, `json`, `jsx`, `less`, `md`, `php`, `phtml`, `php3`, `php4`, `php5`, `php7`, `phps`, `scss`, `sass`, `sh`, `bash`, `sql`, `svg`, `xml`, `yml`, `yaml`, `txt`.
Props westonruter, georgestephanis, obenland, melchoyce, pixolin, mizejewski, michelleweber, afercia, grahamarmfield, samikeijonen, rianrietveld, iseulde.
See #38707.
Fixes#12423, #39892.
Built from https://develop.svn.wordpress.org/trunk@41376
git-svn-id: http://core.svn.wordpress.org/trunk@41209 1a063a9b-81f0-0310-95a4-ce76da25c4cd
* Displays an error notification in the global area when a save attempt is rejected due to invalid settings. An error notification is also displayed when saving fails due to a network error or server error.
* Introduces `wp.customize.Notifications` subclass of `wp.customize.Values` to contain instances of `wp.customize.Notification` and manage their rendering into a container.
* Exposes the global notification area as `wp.customize.notifications` collection instance.
* Updates the `notifications` object on `Control` to use `Notifications` rather than `Values` and to re-use the rendering logic from the former. The old `Control#renderNotifications` method is deprecated.
* Allows notifications to be dismissed by instantiating them with a `dismissible` property.
* Allows `wp.customize.Notification` to be extended with custom templates and `render` functions.
* Triggers a `removed` event on `wp.customize.Values` instances _after_ a value has been removed from the collection.
Props delawski, westonruter, karmatosed, celloexpressions, Fab1en, melchoyce, Kelderic, afercia, adamsilverstein.
See #34893, #39896.
Fixes#35210, #31582, #37727, #37269.
Built from https://develop.svn.wordpress.org/trunk@41374
git-svn-id: http://core.svn.wordpress.org/trunk@41207 1a063a9b-81f0-0310-95a4-ce76da25c4cd
The Plugin details modal custom implementation in the Plugins page conflicts with
other Thickbox instances added by plugins. Thickbox shows its age and has been
modified over time to suit core needs. However, WordPress should do its best to
not create conflicts with the native Thickbox styles and functionalities. Plugin
authors should be able to use `add_thickbox()` in any admin page as documented,
without having to worry about potential errors.
- fixes a JavaScript error when closing a native Thickbox modal in the Plugins page
- avoids to override the native Thickbox modal styles
- uses a CSS class to target the Plugin details modal and remove a pile of overqualified CSS selectors
Fixes#41417.
Built from https://develop.svn.wordpress.org/trunk@41356
git-svn-id: http://core.svn.wordpress.org/trunk@41189 1a063a9b-81f0-0310-95a4-ce76da25c4cd
* Mark a widget as dirty when a field input triggers a `change` or `input` event; clear dirty state when widget is successfully saved.
* Disable Save button and re-label "Saved" when widget not dirty.
* Show AYS dialog when leaving widgets admin screen with unsaved changes.
* When widgets are dirty, expand all unsaved widgets at AYS check and focus on first one.
* Change "Close" link to "Done"; hide link when widget is dirty and reveal when saved.
* The "Done" link persistently appears in the Customizer even after making a change (when the widget is dirty) because changes are autosaved into the changeset.
* Prevent saving widget when form fails `checkValidity`.
* Fix frequency of triggering of `change` event on the rich Text widget's `textarea` limited now to when there are actual changes.
* Add a class of `widget-dirty` to widget containers when the widget has unsaved changes.
Props westonruter, timmydcrawford, melchoyce.
Fixes#41610, #23120.
Built from https://develop.svn.wordpress.org/trunk@41352
git-svn-id: http://core.svn.wordpress.org/trunk@41185 1a063a9b-81f0-0310-95a4-ce76da25c4cd
- Refactors the UI controls around the Iris color picker to output valid and semantic markup
- Simplifies the way elements visibility gets toggled
- Properly associates the visually hidden label with the color input field
- Makes the toggle button a real button
- Adds `aria-expanded` to the toggle button
- Keeps focus on the toggle button instead of moving it to the color input field
- Adds `aria-label` attributes to give better context to some controls
- Removes a redundant title attribute
- Keeps the toggle button text to "Select Color" instead of changing it to "Current Color" when a color is selected
- Slightly improves the responsive view
- CSS clean-up
Fixes#39662.
Built from https://develop.svn.wordpress.org/trunk@41329
git-svn-id: http://core.svn.wordpress.org/trunk@41160 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Patches occasionally come in on generated files. We should be kind to new contributors and give them a hint that these files are auto generated.
Props drewapicture, samuelsidler, netweb, valendesigns, kpdesign, nacin, jorbin
Fixes#30666
Built from https://develop.svn.wordpress.org/trunk@41271
git-svn-id: http://core.svn.wordpress.org/trunk@41111 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Fixes a visual glitch visible on Ubuntu. WordPress uses system fonts and they have
different metrics across operating systems. Uses screen-reader-text as a more
solid way to visually hide text.
Props punit5658, afercia.
Fixes#41497.
Built from https://develop.svn.wordpress.org/trunk@41227
git-svn-id: http://core.svn.wordpress.org/trunk@41067 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Often times, it can be confusing to set a custom permalink structure. One has to double-check the documentation, make
sure to correctly insert the structure tag, and hope not to break their site.
With this addition, the available structure tags are being displayed as a list of easily clickable buttons that can be
used to insert tags to the custom structure input field and to remove them again.
Props kpdesign, swissspidy, joedolson, afercia.
Fixes#29872.
Built from https://develop.svn.wordpress.org/trunk@41182
git-svn-id: http://core.svn.wordpress.org/trunk@41022 1a063a9b-81f0-0310-95a4-ce76da25c4cd
WordPress no longer supports many old old browsers: https://make.wordpress.org/core/2017/04/23/target-browser-coverage/
This also removes alot of no longer necessary CSS. It served us well, but we are never getting back together with IE8,9,10.
So, in the (paraphrased) words of Taylor Swift:
I remember when we dropped support the first time
Saying, "This is it, I've had enough, " 'cause like
We hadn't seen many users in a month
When you said you needed flexbox. (What?)
Then you postMessage again and say
"IE8, I miss you and I swear I'm gonna change, trust me."
Remember how that lasted for a day?
I say, "I hate the box model, " we break up, you call me, "I love css-grids."
Ooh, we called it off again last night
But ooh, this time I'm telling you, I'm telling you
We are never ever ever supporting IE 8,9,10,
We are never ever ever supporting IE 8,9,10,
You go talk to EDGE, talk to my FIREFOX, talk to CHROME
But we are never ever ever ever getting back together
Like, ever...
Fixes#37651.
Props stunnedbeast, netweb, jorbin.
Built from https://develop.svn.wordpress.org/trunk@41062
git-svn-id: http://core.svn.wordpress.org/trunk@40912 1a063a9b-81f0-0310-95a4-ce76da25c4cd
The Text widget in legacy mode omits TinyMCE and retains old behavior for matching pre-existing Text widgets. Usage pointers added to default visual mode appear when attempting to paste HTML code into the Visual tab and when clicking on the Text tab, informing users of the new Custom HTML widget.
Props westonruter, melchoyce, gitlost for testing, obenland for testing, dougal for testing, afercia for testing.
See #35243.
Fixes#40951.
Built from https://develop.svn.wordpress.org/trunk@41050
git-svn-id: http://core.svn.wordpress.org/trunk@40900 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Fixes some minor HTML issues in the admin and, most notably, changes the rel
attribute used in the List Tables from `rel="permalink"` to `rel="bookmark"`.
Props mihai2u, pento, arena, topher1kenobe, michalzuber, stubgo.
Fixes#37004.
Built from https://develop.svn.wordpress.org/trunk@40823
git-svn-id: http://core.svn.wordpress.org/trunk@40680 1a063a9b-81f0-0310-95a4-ce76da25c4cd
- Close the form after obtaining a valid location.
- Fix focusing the toggle button after closing the form.
- Fix aria attribute values.
- Fix positions in IE11.
- Some JS and CSS cleanup.
Props afercia, coreymckrill.
Fixes#40735.
Built from https://develop.svn.wordpress.org/trunk@40789
git-svn-id: http://core.svn.wordpress.org/trunk@40647 1a063a9b-81f0-0310-95a4-ce76da25c4cd
On Chrome 58 and above, plugin names within the plugin details modal were collapsed down into an ellipsis. This fix rewrites the CSS to make sure the titles are always shown.
Props mrwweb, afercia, Presskopp.
Fixes#40579.
Built from https://develop.svn.wordpress.org/trunk@40672
git-svn-id: http://core.svn.wordpress.org/trunk@40535 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Add a 'delete' link next to the update button on the term edit screen so you can delete a term while you are reviewing it's details.
Props cklosows, bradt, ocean90, johnbillion, DrewAPicture, ryan, MatheusGimenez, maguiar.
Fixes#9777.
Built from https://develop.svn.wordpress.org/trunk@40655
git-svn-id: http://core.svn.wordpress.org/trunk@40518 1a063a9b-81f0-0310-95a4-ce76da25c4cd
The last time a new widget was introduced, Vuvuzelas were a thing, Angry Birds started taking over phones, and WordPress stopped shipping with Kubrick. Seven years and 17 releases without new widgets have been enough, time to spice up your sidebar!
Props westonruter, melchoyce, obenland, timmydcrawford, adamsilverstein, gonom9, wonderboymusic, Fab1en, DrewAPicture, sirbrillig, joen, matias, samikeijonen, afercia, celloexpressions, designsimply, michelleweber, ranh, kjellr, karmatosed.
Fixes#32417, #39993, #39994, #39995.
Built from https://develop.svn.wordpress.org/trunk@40640
git-svn-id: http://core.svn.wordpress.org/trunk@40501 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Valid code is important not just to formally meet the specification, but also to
ensure user agents, including assistive technologies, can accurately interpret
and parse content. When HTML elements are not used in the recommended way,
user agents may render them in unexpected ways. It can also become a problem for
compatibility with older or even future browsers, devices, or other software.
See W3C WCAG 4.1.1.
Props takayukister, aryamaaru.
Fixes#34881.
Built from https://develop.svn.wordpress.org/trunk@40572
git-svn-id: http://core.svn.wordpress.org/trunk@40442 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Links used as UI controls that behave like buttons, should be buttons.
- changes the widgets "toggle", "Delete", and "Close" links to buttons
- uses `aria-expanded` to announce the state of the toggle buttons
- increases a bit the clickable area of the toggle
- ensures the "circular focus" doesn't get cut-off in some browsers by centering the toggle arrows
- uses a `<span>` element with an `aria-hidden` attribute to hide CSS generated font icons from assistive technologies
- standardizes on `.toggle-indicator:before` rather than `:after`
- changes two `#f00` reds in `#dc3232`, see #35622Fixes#31476.
Built from https://develop.svn.wordpress.org/trunk@40480
git-svn-id: http://core.svn.wordpress.org/trunk@40356 1a063a9b-81f0-0310-95a4-ce76da25c4cd
For better accessibility, expandable panels should be placed immediately after
the control that expands them. This change moves the Media Library inline
uploader up, right after the "Add New" button, also introducing consistency with
the Plugin and Theme uploaders.
Adds a proper ARIA role on the button and an `aria-expanded` attribute to give
better feedback to assistive technologies users about the uploader's expanded state.
Improves the focus handling when closing the uploader, improves the focus style
and color contrast ratio of the uploader "close" button.
Props mantismamita, karmatosed, adamsilverstein, afercia.
Fixes#37188.
Built from https://develop.svn.wordpress.org/trunk@40359
git-svn-id: http://core.svn.wordpress.org/trunk@40266 1a063a9b-81f0-0310-95a4-ce76da25c4cd
After [40059] the CSS class `button-link` uses `text-align: left` by default.
This change now requires to limit as much as possible the use of `button-link`
to controls that should really look like links and to explicitly set
`text-align: center` in a few other cases.
Fixes#39983.
Built from https://develop.svn.wordpress.org/trunk@40358
git-svn-id: http://core.svn.wordpress.org/trunk@40265 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This extends the existing behavior which only showed a message only when there were no widget areas rendered in the preview. The number of non-rendered widget areas is indicated. Also removes needles deletion of `wp.customize.Widgets.data.l10n` property which hindered plugins.
See #33567, #33052.
Fixes#39087.
Built from https://develop.svn.wordpress.org/trunk@40312
git-svn-id: http://core.svn.wordpress.org/trunk@40219 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Updates `.button-link` adding color and underline to make link-like buttons look
like links by default. Introduces `.button-link-delete` as a modifier, stackable
CSS class for red button-links.
Props Cheffheid, afercia.
See #34242.
Fixes#35126.
Built from https://develop.svn.wordpress.org/trunk@40052
git-svn-id: http://core.svn.wordpress.org/trunk@39989 1a063a9b-81f0-0310-95a4-ce76da25c4cd
With [38951] the support for custom page templates has been extended to all post
types. By making the visible meta box titles real labels, accessibility improves
for all users and form fields have meaningful labels.
Fixes#38790.
Built from https://develop.svn.wordpress.org/trunk@39247
git-svn-id: http://core.svn.wordpress.org/trunk@39187 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Adds translation context for "Hide Controls" strings so translators can supply shorter strings where space is constrained. Adds styles to fade-out long the "Hide Controls" label where it would run into the device preview buttons.
Props westonruter, ocean90.
Fixes#38762.
Built from https://develop.svn.wordpress.org/trunk@39214
git-svn-id: http://core.svn.wordpress.org/trunk@39154 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This helps affirm that your upload is fine, and has not been reduced down to the first page or changed into an image. This applies to the attachment details modal in the media library, where media is also now centered in the preview area.
props folletto, helen.
fixes#38717.
Built from https://develop.svn.wordpress.org/trunk@39213
git-svn-id: http://core.svn.wordpress.org/trunk@39153 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Fixes regression introduced with the addition of control notifications in [37476]. The container element for notifications is injected after the `.customize-control-title` element if the `.customize-control-notifications-container` element does not already exist in the control's template. Also adds missing margin between current image and uploaded images.
Props bradyvercher.
See #34893.
Fixes#38561.
Built from https://develop.svn.wordpress.org/trunk@39145
git-svn-id: http://core.svn.wordpress.org/trunk@39085 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Currently, the "Collapse menu" item is not focusable and keyboard users can't collapse/expand the admin menu. This aims to fix it so that screen readers no longer announce it as a clickable but it remains unfocusable and thus unusable. So it's now a button.
Quoting joedolson at WordCamp Chicago 2014:
"If it's supposed to act like a button, it should be a button."
Also includes a grunt:precommit run that picked up some postcss changes to src/wp-includes/css/customize-preview.css
Fixes#29958.
Props ajercia, ipm-frommen for an iterative patch, valendesigns for an iterative patch, GaryJ for feedback, joedolson for feedback, helen for feedback
Built from https://develop.svn.wordpress.org/trunk@39141
git-svn-id: http://core.svn.wordpress.org/trunk@39081 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This is a great goal for core, and is close, but it is not in shape to be shipped for 4.7 and there is not enough time left in the development cycle to alter and polish sufficiently. There are bugs, but more than that, there are more fundamental questions around the use of existing UI, general UX, and how findable themes are (not) on the .org side.
see #37661.
Built from https://develop.svn.wordpress.org/trunk@39140
git-svn-id: http://core.svn.wordpress.org/trunk@39080 1a063a9b-81f0-0310-95a4-ce76da25c4cd
- adds hidden text to the pagination links
- slightly increases the links clickable area
- fixes a JS error when clicking on the current page number
- avoids to generate nested `<div>` elements at each click
Props xavortm, cwpnolen, afercia.
Fixes#35577.
Built from https://develop.svn.wordpress.org/trunk@38981
git-svn-id: http://core.svn.wordpress.org/trunk@38924 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Introduces new control for managing the background position. Adds control for setting the `background-size`.
Props cdog, celloexpressions, grapplerulrich, MikeHansenMe, FolioVision, afercia, helen, melchoyce, karmatosed, westonruter, Kelderic, sebastian.pisula.
Fixes#22058.
Built from https://develop.svn.wordpress.org/trunk@38948
git-svn-id: http://core.svn.wordpress.org/trunk@38891 1a063a9b-81f0-0310-95a4-ce76da25c4cd
The color control in the customizer can use the new mode by supplying the `mode` param with `hue` (as opposed to the new default `full` value). New control replaces the `range` control in Twenty Seventeen for `colorscheme_hue`. The `wpColorPicker` can opt for hue-only mode via supplying `hue` as the `type` option. Iris Color Picker is updated from v1.0.7 to v1.1.0-beta.
Props mattwiebe, celloexpressions.
Fixes#38263.
Built from https://develop.svn.wordpress.org/trunk@38931
git-svn-id: http://core.svn.wordpress.org/trunk@38874 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This ability was previously added to nav menus via the available page items panel. The "Add New Page" button only appears when the `allow_addition` control param is supplied as `true`. Code is adapted from the Customize Posts feature plugin.
Props celloexpressions, westonruter.
See #38013, #34923.
Fixes#38164.
Built from https://develop.svn.wordpress.org/trunk@38906
git-svn-id: http://core.svn.wordpress.org/trunk@38849 1a063a9b-81f0-0310-95a4-ce76da25c4cd
On the Header Image section, the previously uploaded images disappeared off-screen
when using the keyboard to navigate and the remove "X" button got keyboard focus.
Changing the off-screen CSS technique used for the "X" buttons fixes it.
- improves the focus style on the previously uploaded and suggested images
- removes a `tabindex="0"` attribute from the current header image
Fixes#38156.
Built from https://develop.svn.wordpress.org/trunk@38881
git-svn-id: http://core.svn.wordpress.org/trunk@38824 1a063a9b-81f0-0310-95a4-ce76da25c4cd
- changes the "X" links in buttons, improves their color contrast ratio and focus style
- adds screen reader text "Remove item: + tagname"
- uses `wp.a11y.speak()` to give screen reader users feedback when adding/removing tags
- makes the `tagcloud-link` toggle a button, with an `aria-expanded` attribute to indicate the tag cloud collapsed/expanded state
- changes colors for the autocomplete highlighted option in order to have a better color contrast ratio
- reduces the font size for the autocomplete on Press This
- removes CSS related to the old `suggest.js` from Press This
Props joedolson, cgrymala, azaozz, afercia.
Fixes#27555.
Built from https://develop.svn.wordpress.org/trunk@38880
git-svn-id: http://core.svn.wordpress.org/trunk@38823 1a063a9b-81f0-0310-95a4-ce76da25c4cd
* Custom CSS is associated with a given theme and is displayed in an inline `style` element at the `wp_head` hook after the `wp_print_styles` is called so that it overrides any enqueued stylesheets.
* A `wp_get_custom_css()` function is used for accessing the CSS associated with the current theme (or another theme) and a `wp_get_custom_css` filter for manipulating it.
* CSS is managed in customizer via a new "Additional CSS" section with a single `textarea` control.
* `WP_Customize_Section::$description_hidden` is introduced for hiding extended descriptions in customizer sections behind a help toggle as done with panels.
* CSS is stored in a `custom_css` post type with the theme (stylesheet) slug as the `post_name`.
* `WP_Customize_Custom_CSS_Setting` is introduced to handle validation of CSS, previewing, and persisting the CSS to the `custom_css` post type.
* The `custom_css` setting is tied to a new `unfiltered_css` capability which maps to `unfiltered_html` by default.
* Escaping the message in the notification template is removed to allow markup (`code` tags) to be rendered.
See https://make.wordpress.org/core/2016/10/11/feature-proposal-better-theme-customizations-via-custom-css-with-live-previews/
Props johnregan3, celloexpressions, folletto, westonruter.
Fixes#35395.
Built from https://develop.svn.wordpress.org/trunk@38829
git-svn-id: http://core.svn.wordpress.org/trunk@38772 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Fixes the Add Themes toolbar padding. Standardizes the placeholders to no title
case and three trailing dots. Expands the Media search placeholder in
"Search media items..." for consistency with the Plugins and Themes toolbars.
Props mikeviele, jamesacero, mattking5000, koenschipper, dungengronovius.
Fixes#38010.
Built from https://develop.svn.wordpress.org/trunk@38795
git-svn-id: http://core.svn.wordpress.org/trunk@38738 1a063a9b-81f0-0310-95a4-ce76da25c4cd
On the Menus screen, the links to move menu items behave like buttons: they
perform an action so they should be real buttons to be correctly reported to
assistive technologies. Since they're logically grouped controls, they should
also be wrapped in a `<fieldset>` element for better semantics and accessibility.
Props Cheffheid.
Fixes#35578.
Built from https://develop.svn.wordpress.org/trunk@38770
git-svn-id: http://core.svn.wordpress.org/trunk@38713 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Making behavior changes based on some broad definition of what mobile is rarely, if ever, makes sense. Each bit of functionality should be more clearly targeted, whether that's for screen size, performance, or some kind of touch capability.
props akibjorklund.
see #33704.
Built from https://develop.svn.wordpress.org/trunk@38739
git-svn-id: http://core.svn.wordpress.org/trunk@38682 1a063a9b-81f0-0310-95a4-ce76da25c4cd
- adds a "search" icon into the search fields
- adds a hidden description for the widget search field, targeted by `aria-describedby`
- adds the "clear-results" button to the widgets search
- removes the `change` and `search` events bound on the widget search, for these "live searches" WordPress should standardize on `input` (+ `keyup` when needed)
- adds property and function to keep track and update the number of the widgets search results
- the widgets search results are now announced via `wp.a11y.speak()`
- adds a visible and audible message when there are no widgets search results
- moves some CSS to `customize-controls.css`
Props ryankienstra, melchoyce, afercia.
Fixes#36908.
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git-svn-id: http://core.svn.wordpress.org/trunk@38652 1a063a9b-81f0-0310-95a4-ce76da25c4cd
