This updates the My Sites dropdown menu on multisite installs to display the site icon for each site. When a site icon is not selected, the default WordPress logo will continue showing.
Props rmccue, joemcgill, afercia, audrasjb, desrosj.
Fixes 46657.
Built from https://develop.svn.wordpress.org/trunk@50834
git-svn-id: http://core.svn.wordpress.org/trunk@50443 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Replace infinitely autoloading behavior on scroll with a user-controlled load more button. Fix a long standing accessibility issue in the media library. Infinite scroll poses a wide range of problems for accessibility, usability, and performance.
This change modifies the library to load 40 items in the initial view, with a load more button to load the next 40 items and a button to move focus from the load more region to the first of the most recently added items.
The text for communicating the jump target was broadly discussed, agreeing that the text incorporated here would most concisely and clearly convey the purpose of the button, and any further detail is learnable from use.
Props afercia, adamsilverstein, joedolson, audrasjb, francina
Fixes#50105. See #40330.
Built from https://develop.svn.wordpress.org/trunk@50829
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This officially removes support for Internet Explorer 11 in the CSS files run through the build process in Core.
Individual tickets should be opened for removing each manually maintained area of the code base targeting IE11.
The resulting changes to CSS files are included in this commit.
Fixes#53077.
Built from https://develop.svn.wordpress.org/trunk@50784
git-svn-id: http://core.svn.wordpress.org/trunk@50393 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This ensures that contrast between text color and background meets the WCAG 2.0 AA recommended value. The following locations were changed:
- Network List Tables: Use lighter background colors for site status indicator.
- Nav Menus: Use a lighter background color for invalid menu items.
- Pointers: Use a darker background for pointer header.
- Themes: Use darker background on filter button hover.
- Customizer: Use darker background for selected widget.
Follow-up to [50025], [50571].
Props kebbet, melchoyce, peterwilsoncc.
Fixes#52760.
Built from https://develop.svn.wordpress.org/trunk@50687
git-svn-id: http://core.svn.wordpress.org/trunk@50296 1a063a9b-81f0-0310-95a4-ce76da25c4cd
The color palette changes in #49999 introduced some contrast issues on buttons, input elements, and links. This change ensures that all interactive elements have an appropriate contrast ratio.
Follow-up to [50025].
Props audrasjb, joedolson.
Fixes#52402.
Built from https://develop.svn.wordpress.org/trunk@50278
git-svn-id: http://core.svn.wordpress.org/trunk@49923 1a063a9b-81f0-0310-95a4-ce76da25c4cd
The update icon rotation should not occur when the user has opted to reduce motion, for example by selecting the "Reduce motion" option in macOS' preferences or unselecting "Show animations in Windows" in Windows' preferences.
Follow-up to [47813], [50027].
Props xkon, audrasjb, johnbillion.
Fixes#52263. See #51476.
Built from https://develop.svn.wordpress.org/trunk@50028
git-svn-id: http://core.svn.wordpress.org/trunk@49729 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This provides better indication within the viewport about ongoing processes on the page when updating several plugins at the same time, but without using the bulk updater.
Props ravipatel, audrasjb, johnjamesjacoby, paaljoachim, hellofromTonya, sabernhardt, mdwolinski, karmatosed, SergeyBiryukov.
Fixes#51476.
Built from https://develop.svn.wordpress.org/trunk@50027
git-svn-id: http://core.svn.wordpress.org/trunk@49728 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This is part of a larger project in cleaning up core's admin CSS. This collapses all colors used in the CSS to one of 12 blues, greens, reds, and yellows, 13 grays, pure black, and pure white. The colors are perceptually uniform from light to dark, half of each range has a 4.5 or higher contrast against white, the other half has a 4.5 or higher contrast against black.
Standardizing on this set of colors will help contributors make consistent, accessible design decisions. The full color palette can be seen here: https://codepen.io/ryelle/full/WNGVEjw
Props notlaura, danfarrow, kburgoine, drw158, audrasjb, Joen, hedgefield, ibdz, melchoyce.
See #49999.
Built from https://develop.svn.wordpress.org/trunk@50025
git-svn-id: http://core.svn.wordpress.org/trunk@49726 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This includes the packages that match the Gutenberg 9.2 Release.
It is going to be the last block-editor features update for WordPress 5.6.
It also updates the block-supports code base to the latest APIs.
Props isabel_brison, noisysocks, desrosj.
Fixes#51570.
Built from https://develop.svn.wordpress.org/trunk@49226
git-svn-id: http://core.svn.wordpress.org/trunk@48988 1a063a9b-81f0-0310-95a4-ce76da25c4cd
In [48456], database import and export icons were introduced. However, the arrows were pointing in the wrong directions. This reverses the arrows to be pointing correctly based on the action described in the name.
Props johnbillion, joen, desrosj, empireoflight.
Fixes#49913.
Built from https://develop.svn.wordpress.org/trunk@48506
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- improves focus management by moving focus to the notices, if any, or to the first "tabbable" element
- this avoids a focus loss and helps Braille-only and screen magnification users to be aware of the messages
- adds an ARIA role `alert` to all the notices
- uses `wp.a11y.speak()` to announce messages to assistive technology
- this way, all visual users will see the messages while assistive technology users will get an audible message
- uses `wp.i18n` for translatable strings in `wp-admin/js/image-edit.js`
Props anevins, ryanshoover, antpb, SergeyBiryukov, afercia.
See #20491.
Fixes#47147.
Built from https://develop.svn.wordpress.org/trunk@48375
git-svn-id: http://core.svn.wordpress.org/trunk@48144 1a063a9b-81f0-0310-95a4-ce76da25c4cd
For a number of years, WordPress has been using a `#00a0d2` blue shade for the links `:hover` state. This blue shade doesn't have a sufficient color contrast with the various (too many) background colors used in the admin interface.
The new `#006799` blue shade is part of the official WordPress color palette and does have a sufficient color contrast with most of the admin backgrounds.
Props ryokuhi, audrasjb, joedolson, mapk.
See #47682.
Built from https://develop.svn.wordpress.org/trunk@48368
git-svn-id: http://core.svn.wordpress.org/trunk@48137 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This change removes the disabled state from the admin scheme specific styles.
Fixes#48709.
Props drw158, SergeyBiryukov, afercia, kennethroberson5556, melchoyce, joedolson, valentinbora, audrasjb, larrach, nrqsnchz, youknowriad.
Built from https://develop.svn.wordpress.org/trunk@48360
git-svn-id: http://core.svn.wordpress.org/trunk@48129 1a063a9b-81f0-0310-95a4-ce76da25c4cd
For a number of years, various screens in the WordPress admin provided users with a readonly input field to copy the attachment file URL. Manually copying from a readonly field is an annoying task at best even for mouser users. It's a usability and accessibility issue at the same time.
These fields now have a new "Copy URL" button that is easy to use and accessible to everyone.
Props theolg, markdubois, vabrashev, sajjad67, xkon, nrqsnchz, melchoyce, audrasjb, afercia.
See #41612, #50322, #50335.
Fixes#48463.
Built from https://develop.svn.wordpress.org/trunk@48232
git-svn-id: http://core.svn.wordpress.org/trunk@48001 1a063a9b-81f0-0310-95a4-ce76da25c4cd
In WordPress 3.2 support for IE6 was dropped, IE7 followed a few versions later. With the 4.8 release, WordPress officially ended support for Internet Explorer versions 8, 9, and 10. Yet, we still have shipped CSS for the unsupported IE versions....until now! Goodbye to ie.css and star hacks!
* Removes ie.css and `ie` style handle.
* Removes IE specific class names and any related CSS.
* Drops support for IE8 and older in `wp_customize_support_script()`.
* Updates compatibility mode for CSS minification to `ie11`.
Props ayeshrajans, isabel_brison, afercia, netweb, peterwilsoncc, ocean90.
Fixes#17232, #46015.
Built from https://develop.svn.wordpress.org/trunk@47771
git-svn-id: http://core.svn.wordpress.org/trunk@47547 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Implementation of bottom padding in overflow content differs across browsers. See https://github.com/w3c/csswg-drafts/issues/129. To make bottom spacing consistent across browsers there's the need for an alternate CSS method.
- uses a CSS `after` pseudo element or simply a bottom margin to reserve some bottom spacing
- removes a couple leftovers from [40428]
- fixes an annoying visual glitch where the media modal content is visible behind the bottom toolbar border
Props sabernhardt, afercia.
See #40152.
Fixes#48378.
Built from https://develop.svn.wordpress.org/trunk@47266
git-svn-id: http://core.svn.wordpress.org/trunk@47066 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This patch integrates DependencyExtractionWebpackPlugin which was battle-tested in Gutenberg.
This will greatly simplify the process of upgrading npm packages which change after every Gutenberg release. It might even useful during the WordPress release cycle as we might need to publish more often as we discover critical bugs and regressions.
Props jonsurrell, adamsilverstein, youknowriad, ocean90, netweb.
Fixes#48154.
Built from https://develop.svn.wordpress.org/trunk@47035
git-svn-id: http://core.svn.wordpress.org/trunk@46835 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This improves the appearance of various form controls in the admin and addresses some visual inconsistencies in WordPress 5.3.
Props afercia, audrasjb, jameskoster, GDragoN, azaozz, michaelarestad, murgroland, SamuelFernandez, chetan200891, veminom, dlh.
Fixes#48420.
Built from https://develop.svn.wordpress.org/trunk@46866
git-svn-id: http://core.svn.wordpress.org/trunk@46666 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.
This is a follow-up to [41271], which added the banner to minified CSS files.
Fixes#48424. See #30666.
Built from https://develop.svn.wordpress.org/trunk@46589
git-svn-id: http://core.svn.wordpress.org/trunk@46386 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Thew new dotted outline for the links focus style introduced in [46241] doesn't appear to be ready to guarantee a good indication of focus.
It was agreed to restore the previous links focus style and postpone exploration for a new style to the next release cycle.
Partially reverts [46241] and [46293].
See #34904, #47153.
Built from https://develop.svn.wordpress.org/trunk@46425
git-svn-id: http://core.svn.wordpress.org/trunk@46223 1a063a9b-81f0-0310-95a4-ce76da25c4cd
- improves the buttons `.active` CSS class for buttons that need to be styled as "pressed"
- update the alternate color schemes `.active` CSS class accordingly
- improves a few icons colors in the alternate color schemes
See #34904.
Built from https://develop.svn.wordpress.org/trunk@46423
git-svn-id: http://core.svn.wordpress.org/trunk@46221 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Visible `<label>` elements benefit all users. The `placeholder` attribute should not be used as a replacement for visible labels.
Instead, it's supposed to be used only for a short hint to aid users with data entry e.g. a sample value or a brief description of the expected format.
Screen readers may not announce a `placeholder` attribute at all. Other users may suffer from the lack of a visible label and a placeholder used as replacement, for example:
- users with cognitive disabilities may have trouble remembering what the filled field does
- speech recognition users cannot see the name they can speak to set focus on the field
- low-vision users with high text-size may not be able to see the whole placeholder even when it's visible, if its value is clipped by the edge of the input
Props anevins, audrasjb, karmatosed, azaozz, SergeyBiryukov, afercia.
See #40331.
Fixes#47138.
Built from https://develop.svn.wordpress.org/trunk@46418
git-svn-id: http://core.svn.wordpress.org/trunk@46216 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Headings are the predominant mechanism for screen reader users to find information in a page. They also help all users to better identify the main sections of user interfaces.
- adds three new headings within the media modal
- improves plural form translation for "item selected" by using `wp.i18n`
- horizontally centers the media modal menu in the responsive view
Props kjellr, karmatosed, melchoyce, afercia.
See #47149.
Fixes#47610.
Built from https://develop.svn.wordpress.org/trunk@46375
git-svn-id: http://core.svn.wordpress.org/trunk@46174 1a063a9b-81f0-0310-95a4-ce76da25c4cd
For a number of years, subtitles track added to videos were always set to "English" regardless of the actual subtitles language.
By making the track `srclang`, `label`, and `kind` attributes editable, content authors are now able to set a language that matches the actual track content.
Props BjornW, audrasjb, birgire, karmatosed, sabernhardt, afercia.
Fixes#47559.
Built from https://develop.svn.wordpress.org/trunk@46373
git-svn-id: http://core.svn.wordpress.org/trunk@46172 1a063a9b-81f0-0310-95a4-ce76da25c4cd
The ARIA tabs pattern improves interaction for keyboard and assistive technologies users.
It gives the menu items proper roles, and `aria-selected` allows users of assistive technologies to know which tab is currently selected.
Props audrasjb, afercia, joedolson, karmatosed, melchoyce.
See #47149.
Built from https://develop.svn.wordpress.org/trunk@46363
git-svn-id: http://core.svn.wordpress.org/trunk@46162 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Introduces better contrast for borders of the following user interface elements:
- Tables
- Screen Options and Help
- Admin notices
- Welcome panel
- Meta boxes (post boxes)
- Cards
- Health Check accordions and headings
- Theme and Plugin upload forms
Props kjellr, melchoyce, karmatosed, audrasjb.
Fixes#48101.
Built from https://develop.svn.wordpress.org/trunk@46242
git-svn-id: http://core.svn.wordpress.org/trunk@46054 1a063a9b-81f0-0310-95a4-ce76da25c4cd
- Introduces new styles for the buttons, with better contrast for borders and better focus style.
- Introduces a new focus style for links.
- The new styles improve consistency with the ones used in the new Block Editor (Gutenberg).
Props michaelarestad, truchot, mor10, kellychoffman, adamsoucie, paaljoachim, Joen, kjellr, melchoyce, karmatosed, audrasjb, afercia.
Fixes#34904.
Built from https://develop.svn.wordpress.org/trunk@46241
git-svn-id: http://core.svn.wordpress.org/trunk@46053 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Title attributes on abbreviations are only available to a minority of users. The
best option is to avoid unnecessary abbreviations when possible. In the other cases,
use an `<abbr>` element (which provides a hint to user agents on how to announce
and display the abbreviation) and provide an expansion in plain text on first use.
- `readme.html`: improves abbreviations and removes unnecessary `title` attributes
- options-general: removes unnecessary abbreviations and improves the remaining ones
- customizer schedule changeset date: removes unnecessary abbreviations and improves the remaining ones
- posts table date: uses a `span` element instead of an `abbr` element because this is not an abbreviation
Fixes#46980.
Built from https://develop.svn.wordpress.org/trunk@45930
git-svn-id: http://core.svn.wordpress.org/trunk@45741 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Previously the sites were truncated which meant longer names but with ending identifications were unable to be seen as different. This shows the full site name to allow easier understanding.
Props tferry, melinedo, afercia, jeremyfelt
Fixes: 47112
Built from https://develop.svn.wordpress.org/trunk@45826
git-svn-id: http://core.svn.wordpress.org/trunk@45637 1a063a9b-81f0-0310-95a4-ce76da25c4cd
For a number of years, the Media modal missed an explicit ARIA role and the required attributes for modal dialogs.
This was confusing for assistive technology users, since they may not realize they're inside a dialog, and that consequently the keyboard interactions may be different from the rest of the page. Lack of an explicit label for the dialog was confusing as well, since assistive technology users didn't have an immediate sense of what the dialog is for.
This change makes the Media modal meet the ARIA Authoring Practices recommendations, helping users better understand the purpose and interactions with the modal. Also, it makes sure to hide the rest of the page content from assistive technologies, until support for `aria-modal="true"` improves.
Additionally:
- moves the modal H1 heading to the beginning of the modal content
- changes the modal left menu position to make visual and DOM order match
- improves the `wp.media.view.FocusManager` documentation
Fixes#47145.
Built from https://develop.svn.wordpress.org/trunk@45572
git-svn-id: http://core.svn.wordpress.org/trunk@45383 1a063a9b-81f0-0310-95a4-ce76da25c4cd
- changes the media views form controls to have explicitly associated labels with for/id attributes
- adds a few missing labels / aria-labels
- improves a few existing labels / aria-labels
- improves semantics in a few places, by adding visually hidden headings, fieldset + legend elements, aria-describedby attributes
- improves the image custom size input fields and their labelling
- adds `role="status"` to the "saved" indicator so that status messages are announced to assistive technologies
- swaps the columns source order in the image details template, to make visual and DOM order match
- swaps the "Replace" and "Back" buttons source order in the Replace Image view, to make visual and DOM order match
- gallery settings: move checkbox label to the right: checkboxes are supposed to have labels on the right
- merge similar strings, unified to "Drop files to upload" (removed "Drop files here", and "Drop files anywhere to upload")
- makes the "upload-ui" consistent across the media views
- hides the IE 11 "X" `::-ms-clear` button in the Insert from URL field, as it conflicts with the uploading spinner
- adds comments to all the media templates to clarify their usage
- slightly increases vertical spacing between form fields in the media sidebar
- removes some CSS selectors introduced as backwards compatibility for WordPress pre-4.4
- removes some CSS still targeting Internet Explorer 7 and 8
Fixes#47141.
Fixes#47122.
Built from https://develop.svn.wordpress.org/trunk@45499
git-svn-id: http://core.svn.wordpress.org/trunk@45310 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This changeset introduces several changes around usability when recovery mode is active:
* Display a notice in the admin clarifying that the user is in recovery mode.
* Use a highlight color for the admin bar link to exit recovery mode.
* Exit recovery mode automatically when logging out.
* Include a recovery mode indicator in the title tag.
Props aandrewdixon, azaozz, dhanukanuwan, flixos90, henrywright, karmatosed, mapk, melchoyce, spacedmonkey, TimothyBlynJacobs, tinkerbelly.
See #46608.
Built from https://develop.svn.wordpress.org/trunk@45117
git-svn-id: http://core.svn.wordpress.org/trunk@44926 1a063a9b-81f0-0310-95a4-ce76da25c4cd
In [44940], the Dashicon files in core were updated to contain the latest version of the font from the GitHub repo. This change follows that up by fixing several backwards compatibility issues caused by the new build process used to generate the font files and fixes the missing menu icon when viewing the admin on small screens.
- `buddicons-bbpress-logo (f12b)` was moved back to the correct location of `f477`.
- `editor-ltr (f129)` was moved back to the correct location of `f10c`.
- `email-alt2 (f10a)` was moved to the correct location of `f467`.
The following icons were restored to their previous locations:
- `camera-alt (f129)`
- `edit-large (f327)`
- `editor-distractionfree (f211)`
- `update-alt (f113)`
- `twitter-alt (f302)`
- `text-page (f121)`
- `plugins-checked (f485)`
- `menu-alt3 (f349)`
- `menu-alt2 (f329)`
- `menu-alt (f228)`
- Duplicate lock icon at location `f315`
- Duplicate `editor-code` icon at location `f494`
- `arrow-up` at `f143`.
The `editor-ltr` and `editor-rtl` icons had also been switched. The arrows now point in the correct directions at the correct Unicode locations (`f10c` and `f320` respectively).
And, lastly, this change also introduces the `code-standards (f13a)` icon that was not included in the previous build.
Props afercia, earnjam, oztaser, joen, cathibosco1, ianbelanger, desrosj.
See #41074.
Fixes#46611.
Built from https://develop.svn.wordpress.org/trunk@45040
git-svn-id: http://core.svn.wordpress.org/trunk@44849 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This change introduces the following new icons to the Dashicon font:
- `.dashicons-admin-site-alt (f11d)`
- `.dashicons-admin-site-alt2 (f11e)`
- `.dashicons-admin-site-alt3 (f11f)`
- `.dashicons-buddicons-activity (f452)`
- `.dashicons-buddicons-bbpress-logo (f12b)`
- `.dashicons-buddicons-buddypress-logo (f448)`
- `.dashicons-buddicons-community (f453)`
- `.dashicons-buddicons-forums (f449)`
- `.dashicons-buddicons-friends (f454)`
- `.dashicons-buddicons-groups (f456)`
- `.dashicons-buddicons-pm (f457)`
- `.dashicons-buddicons-replies (f451)`
- `.dashicons-buddicons-topics (f450)`
- `.dashicons-buddicons-tracking (f455)`
- `.dashicons-businessperson (f12e)`
- `.dashicons-businesswoman (f12f)`
- `.dashicons-color-picker (f131)`
- `.dashicons-editor-ltr (f129)`
- `.dashicons-editor-ol-rtl (f12c)`
- `.dashicons-email-alt2 (f10a)`
- `.dashicons-instagram (f12d)`
- `.dashicons-menu-alt (f10b)`
- `.dashicons-rest-api (f124)`
- `.dashicons-yes-alt (f12a)`
- `.dashicons-tide (f10d)`
These icons were added to the `.ttf, ` and `.eot` font files, as well as the SVG sprite. However, they were not added to the `.woff` font file. The new `dashicons.woff2` file should be utilized instead.
For instances where IE<11 needs to be supported, the `.woff` file will remain for backwards compatibility. However, if the new icons are needed in those scenarios, the WOFF format is now included as embedded within the `dashicons.css`.
Props EmpireOfLight, liljimmi, jaymanpandya, netweb, melchoyce, joen, folletto, nateallen, bahia0019, JeffPaul, desrosj, cathibosco1.
Fixes#41074.
Built from https://develop.svn.wordpress.org/trunk@44940
git-svn-id: http://core.svn.wordpress.org/trunk@44771 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Many users found the attachment URL field confusing: it says "URL" so it may appear like a field meant to paste a URL into.
Also, the Alt text field is the most important one in terms of content, while the Title field needs to be de-emphasized.
- changes the URL field label to "Copy link"
- moves the alt text field to the top as first field
- avoids to set initial focus on the alt text field
- adds an explanatory text with a link pointing to the W3C "alt decision tree" tutorial
- adds `aria-describedby` to target the explanatory text
- adjusts the CSS accordingly
- updates the QUnit index.html file
Props melchoyce, audrasjb, afercia.
Fixes#41612.
Built from https://develop.svn.wordpress.org/trunk@44900
git-svn-id: http://core.svn.wordpress.org/trunk@44731 1a063a9b-81f0-0310-95a4-ce76da25c4cd
CSS generated content is rendered for speech output. When it's not meant to be announced by assistive technologies, for example with font icons, special care should be used to hide it. At the moment, the only reliable way to do this is making use of a wrapper element and set `aria-hidden="true"` on it.
Fixes#37513.
Built from https://develop.svn.wordpress.org/trunk@44793
git-svn-id: http://core.svn.wordpress.org/trunk@44625 1a063a9b-81f0-0310-95a4-ce76da25c4cd
- properties should be followed by a colon and a space
- media queries shouldn't use spaces within parenthesis
- indentation should use tabs instead of spaces or mixed spaces / tabs
- the content property should use double quotes
- no double spaces
Props nadim0988, afercia.
Fixes#45185.
Built from https://develop.svn.wordpress.org/trunk@44637
git-svn-id: http://core.svn.wordpress.org/trunk@44468 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Introduces in core new focus styles dedicated to Windows High Contrast mode. The
new styles use a transparent CSS outline as already explored in the Block Editor.
This first part covers some of the main user interface controls like buttons, links,
and media views elements. Other parts will be addressed in the next future.
Fixes#41286.
Built from https://develop.svn.wordpress.org/trunk@44544
git-svn-id: http://core.svn.wordpress.org/trunk@44375 1a063a9b-81f0-0310-95a4-ce76da25c4cd
After the JavaScript reorganization in [43309], it was no longer possible to test WordPress from the `src` folder. That meant a build step was required to test PHP modifications. That is suboptimal as even a simple copy is slower than a web server just serving the new file.
We achieve building to `src` by setting a `WORKING_DIR` constant in the Gruntfile that is `build` by default, but changes to `src` when the `--dev` flag is present on any Grunt command. We provide sensible defaults so some commands, such as copying `version.php`, always build to `build`.
Because testing from `build` is no longer required, we change the messages present in `index.php` and `wp-admin/index.php` to be more broadly about building WordPress.
We also change the webpack config to have more straightforward behavior based on the `buildTarget` argument. It only determines the build target now and has no implicit behavior anymore. `grunt build` still works as it worked before, to make sure that the build server produces the same `wordpress.zip` we are used to.
We do all this instead of a symlink setup because symlinks don't work on every platform.
Props omarreiss, netweb, flixos90, SergeyBiryukov.
Fixes#44492.
Built from https://develop.svn.wordpress.org/trunk@44359
git-svn-id: http://core.svn.wordpress.org/trunk@44189 1a063a9b-81f0-0310-95a4-ce76da25c4cd
