maybe_regenerate_attachment_metadata() is now wp_maybe_generate_attachment_metadata().

props kovshenin.
fixes #26825.

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Twenty Fourteen: Add a .button class.

props celloexpressions.
fixes #27075.

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git-svn-id: http://core.svn.wordpress.org/trunk@27289 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Call the correct `remove()` method on the MEjs instance when exiting the media modal.

See #27016.


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Add missing Dashicons classes to Network Admin menu, see #26630.
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At long last, a first pass at bringing the image editor into the media modal. props gcorne, DH-Shredder, tomauger. see #21811.

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TinyMCE:
- Restore the "link" button state to disabled by default and enabled when text or image is selected.
- Remove the (recently added) default `link` plugin, not needed for `wpLink`.
See #27309
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git-svn-id: http://core.svn.wordpress.org/trunk@27293 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Remove the box-shadow from the separator in the right sidebar of the media modal.

Props avryl.
Fixes #27217. 


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TinyMCE: add Ctrl+K, the "de-facto standard" shortcut to open wpLink, fixes #27305
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Support the `autoplay` attribute, even when the plugin type for a MediaElement instance is Flash. In the media modal, `wp.media.view.VideoDetails` and `wp.media.view.AudioDetails` now extend a unified `wp.media.view.MediaDetails` class which contains all of the player creation and destruction logic. The `remove()` method mimics the `mejs.MediaElementPlayer.remove()` method, but does not re-add the audio/video tag to the DOM. The MEjs method is especially problematic when the tag has `autoplay="true"` and the view has been detached but not destroyed.

Fixes #25077.
See #27016.


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TinyMCE editimage: show the toolbar on `mouseup` to avoid accidental clicks on the buttons, fixes #24409
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Videos in the media modal:

* Support rendering of chromeless YouTube when a video shortcode's `src` is a YouTube URL. 
* Don't instantiate an instance of `MediaElementPlayer` until after the view has been attached to the DOM and the view's `ready` event has fired.
* Don't set `poster` for videos when its value is empty. Much like `src` in the `img` tag - when empty, it will assume and load the current window's URL.
* When removing a player instance, don't call the `pause` method if the playback is not native.

See #27016.


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git-svn-id: http://core.svn.wordpress.org/trunk@27298 1a063a9b-81f0-0310-95a4-ce76da25c4cd
JSHint addendum to [27450].

See #27016.


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When `MEDIA_TRASH` is true, show the proper context in the `attachment-details` sidebar. Without this fix, it always showed "Delete Permanently."

Props toszcze.
Fixes #26783.


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git-svn-id: http://core.svn.wordpress.org/trunk@27300 1a063a9b-81f0-0310-95a4-ce76da25c4cd
When setting `posts_per_page` in `WP_Query::get_posts()`, check for `is_feed()` in the same place where `posts_per_page` is set when it is not already set. Previously, when `is_feed()` was true, `posts_per_page` would be arbitrarily overwritten. This fix allows `posts_per_page` to be set during `pre_get_posts` when `is_feed()` is true and not be overwritten.

Adds unit test.

Props wokamoto.
Fixes #25380.


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On second thought, allow `posts_per_rss` to be set in `pre_get_posts` to override the `posts_per_rss` option. There are backwards compatibility concerns otherwise.

Props nacin.
Partially reverts [27455]. Updates the unit test. See #25380.


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git-svn-id: http://core.svn.wordpress.org/trunk@27302 1a063a9b-81f0-0310-95a4-ce76da25c4cd
`get_term_children()` returns an array of IDs, not objects. The docs have been updated to reflect this.

Fixes #27312.


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In `get_terms()`, leverage `get_term_children()` over `_get_term_children()` when making sure to show empty terms that have children in a hierarchical taxonomy while avoiding duplicates.

Adds unit test for `child_of` param. Adjusts unit tests for `get_terms()`.

See [27108] and [27125].
Props SergeyBiryukov.
Fixes #27123.


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