Cleanup after [29179]:

Don't attach nodes to the view instance and check if the iframe still exists before resizing.

Props avryl.
See #28905.

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git-svn-id: http://core.svn.wordpress.org/trunk@28977 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Cleanup after [29179]:

* Remove `wp.media.mixin.pauseAllPlayers()` - was only ever intended to be used in MCE views, reaches too far into global scope. Rendered irrelevant since [28364].
* Remove `wp.media.mixin.pausePlayers()` - added in [28364]. MCE views no longer keep track of player instances and call mixin methods, they refer to their child iframes and call MEjs methods on the iframe's `window.mejs.players`. 

See #28905.

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git-svn-id: http://core.svn.wordpress.org/trunk@28978 1a063a9b-81f0-0310-95a4-ce76da25c4cd
TinyMCE: fix `aligncenter` for html5-captions, props obenland, fixes #28681.
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git-svn-id: http://core.svn.wordpress.org/trunk@28979 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Avoid a race condition when multiple windows are open so that orphaned terms cannot be created by accident.

Adds a unit test.

Props dlh.
Fixes #19205.

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git-svn-id: http://core.svn.wordpress.org/trunk@28980 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Make `has_shortcode()` recursive/work for nested shortcodes.

Adds unit test.

Props katzwebdesign.
Fixes #26343.

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git-svn-id: http://core.svn.wordpress.org/trunk@28981 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Make sure that the `ready` event only fires once for relevant MCE views that are sandbox'd in iframes. Move some editor callbacks to `initialize`.

Props avryl.
See #28905.

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git-svn-id: http://core.svn.wordpress.org/trunk@28982 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Fix a typo in the `@access` tag for `WP_List_Table::__get()`.

Props joehoyle.
Fixes #28925. See #28885.

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git-svn-id: http://core.svn.wordpress.org/trunk@28983 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Properly set `$subdomain_error` to `false` when applicable in `ms_subdomain_constants()`. This was previously untestable because it used static vars: use globals instead.

Adds unit test.
Fixes #28697.

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git-svn-id: http://core.svn.wordpress.org/trunk@28984 1a063a9b-81f0-0310-95a4-ce76da25c4cd
In Plugin Install List Table, remove title attribute for plugin action links; add screen-reader-text.

Props joedolson.
Fixes #28853.

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