Default themes: Don't use /** docblocks for simple multiline comments.

props DrewAPicture, ericlewis.
fixes #25256.

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Hook documentation for wp-admin/admin.php.

props DrewAPicture for initial patch.
fixes #25442.

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git-svn-id: http://core.svn.wordpress.org/trunk@25660 1a063a9b-81f0-0310-95a4-ce76da25c4cd
TinyMCE: add support for IE11.
- Add the latest changes from the 3.x branch upstream.
- Reduce the number of calls to tinyMCEPopup.restoreSelection() in our custom plugins.
- Remove the deprecated execCommand("mceBeginUndoLevel");.
See #25281.
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git-svn-id: http://core.svn.wordpress.org/trunk@25661 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fourteen: merge recent stylesheet changes to RTL, and file miscellaneous CSS cleanup.

RTL still needs more responsive fixes, see #25332 -- and a11y menu fixes, see #25054. 
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git-svn-id: http://core.svn.wordpress.org/trunk@25662 1a063a9b-81f0-0310-95a4-ce76da25c4cd
In the event that an Automatic Upgrade fails, send a failure status on the next API request to indicate that it failed, and if the rollback was successful.
See #22704

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Correct a variable typo in [25750]. See #22704

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After a upgrade fails, and we successfully rollback to a previous version, Don't send the version we rolled back to to the API, just that it was successful. See [25750]. See #22704

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Twenty Fourteen: remove CSS transitions, props iamtakashi. Fixes #25553.
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Twenty Fourteen: improve primary navigation styles for a clearer distinction between hover and the current page highlight, and change color to harmonize with the search toggle. Props iamtakashi, fixes #25554.
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