Remove theme support for 'menus' in unregister_nav_menu() when there are no more menus.

props kovshenin.
fixes #26900.

Built from https://develop.svn.wordpress.org/trunk@27220


git-svn-id: http://core.svn.wordpress.org/trunk@27077 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Use filtered per_page value in WP_Plugin_Install_List_Table and WP_Theme_Install_List_Table.

props brasofilo.
fixes #25675.
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git-svn-id: http://core.svn.wordpress.org/trunk@27078 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Convert docs for `wp_nav_menu()` arguments to a hash notation.

Fixes #27163.

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git-svn-id: http://core.svn.wordpress.org/trunk@27079 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Fix reversed return logic in the `wp_nav_menu()` phpdoc.

See #27163.

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git-svn-id: http://core.svn.wordpress.org/trunk@27080 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Remove unused code from WP_Widget::update_callback().

props OriginalEXE.
fixes #24733.
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git-svn-id: http://core.svn.wordpress.org/trunk@27081 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Allow any vimeo.com subdomain for embeds.

props danielbachhuber.
fixes #24170.

Built from https://develop.svn.wordpress.org/trunk@27225


git-svn-id: http://core.svn.wordpress.org/trunk@27082 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Embolden some instructions when installing a network.

props Ipstenu.
fixes #27057.

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git-svn-id: http://core.svn.wordpress.org/trunk@27083 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Remove unused variable.

props ericlewis.
fixes #27176.

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git-svn-id: http://core.svn.wordpress.org/trunk@27084 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Make sure color schemes are registered when WP_Styles is initialized early.

fixes #27175. see #26669.

Built from https://develop.svn.wordpress.org/trunk@27228


git-svn-id: http://core.svn.wordpress.org/trunk@27085 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Make nav menu item add tabs and content consistent with similar tabs on the post edit screen. props corvannoorloos for the initial patch. fixes #26757.

Built from https://develop.svn.wordpress.org/trunk@27229


git-svn-id: http://core.svn.wordpress.org/trunk@27086 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Remove unnecessary assignment and concatenation from the_date() and get_the_date().

props juliobox.
fixes #27181.
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git-svn-id: http://core.svn.wordpress.org/trunk@27087 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Correct @return value for get_the_date().

props TobiasBg.
fixes #27181.
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git-svn-id: http://core.svn.wordpress.org/trunk@27088 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Revert [27228], as it doesn't work with SCRIPT_DEBUG off.

see #27175.
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git-svn-id: http://core.svn.wordpress.org/trunk@27089 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Update Backbone to version 1.1.2.

props gcorne.
fixes #27182.
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git-svn-id: http://core.svn.wordpress.org/trunk@27090 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Bump.

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git-svn-id: http://core.svn.wordpress.org/trunk@27091 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Correct PHPDoc return description for `get_boundary_post()`.

Props ericlewis.
Fixes #22950.

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git-svn-id: http://core.svn.wordpress.org/trunk@27092 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Build: Update version of grunt-autoprefixer devDependency.

The update includes a new version of Autoprefixer which now supports the `ms-touch-action` prop for IE10.
Run `grunt autoprefixer:core` to re-add the missing props in media-view.css.
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git-svn-id: http://core.svn.wordpress.org/trunk@27093 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Inline documentation for hooks in wp-admin/includes/template.php.

Props shelob9 for the initial patch. Props kpdesign.
Fixes #26089.

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git-svn-id: http://core.svn.wordpress.org/trunk@27094 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Access class directly instead of using `this` in the `shortcodeAttrs` method of any factory-generated `wp.media.collection`.

Fixes #27183.


Built from https://develop.svn.wordpress.org/trunk@27238


git-svn-id: http://core.svn.wordpress.org/trunk@27095 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Add core support for Playlists and Video Playlists.

* Playlists operate like galleries in the admin. 
* Provide default UI and JS support in themes using MediaElement and Backbone. 
* The shortcodes are clickable, editable, and configurable using the media modal. 
* Playlists support images for each item, whether or not the current theme supports images for `attachment:audio` and `attachment:video`
* Playlists respond to `$content_width` and resize videos accordingly.
* All playlist data is included inline, using a script tag with `type="application/json"`, allowing anyone to unenqueue the WP playlist JS and roll their own.
* Playlist styles are minimal and work out of the box in the last 5 default themes. They inherit and adapt to the current theme's font styles, and their rules are easily overrideable.

See #26631.


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git-svn-id: http://core.svn.wordpress.org/trunk@27096 1a063a9b-81f0-0310-95a4-ce76da25c4cd