Context for 'Installed' and 'Already Installed' theme strings.

props SergeyBiryukov.
see #27889, for trunk.

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Use correct echoing context function. see #27889.

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git-svn-id: http://core.svn.wordpress.org/trunk@27991 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Fix logic inversion in [28124] to ensure widgets stay with themes during a theme switch.

fixes #27897.

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Theme Installer: Proper redirection and action links post-install in multisite.

fixes #27869.

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Update POT files for bundled themes. see #27843.

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Version bumps for Twenty Eleven, Twenty Twelve, Twenty Thirteen, Twenty Fourteen.

props lancewillett.
see #27843.

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Properly translate 'Select Poster Image'.

props dimadin.
see #27845, for trunk.

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Don't show textareas that have "hidden" as a class in the media modal.

See #27915.


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Customizer: Correct reference to the 'Add new image' button.

props jjeaton.
see #27890, for trunk.

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Add a compatibility layer in `wp-playlist.js` to avoid VM errors from MediaElement's plugin bridge in the TinyMCE views for playlists by suppressing playback for files whose mime-type is not supported in the user's browser natively.

This is similar to how audio and video shortcodes are handled: file types are whitelisted for native playback.

See #27892.


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Properly account for text overflow in `.wp-playlist-caption` by adding `display: block`.

Props celloexpressions.
See #27923.


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Support RTL properly when displaying playlists.

Props SergeyBiryukov.
See #27924.


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Add `calc()` rules for `max-width` of playlist caption.

Props celloexpressions.
See #27923.


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