Twenty Fourteen: remove unneeded `!important` declarations, and comment the ones we absolutely need to keep around. Fixes #26444.
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git-svn-id: http://core.svn.wordpress.org/trunk@26579 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Dashboard backwards compatibility updates.
 * Restore missing wp_dashboard_rss_control() helper.
 * Restore all original 3.7 functions, deprecating many, reusing others. 
 * Rename and remove functions so as not to clash with the original dash plugin.
 * Filter cleanup/restoration.

see #25824, #26334.

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git-svn-id: http://core.svn.wordpress.org/trunk@26580 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fourteen: fix too-wide search "jump to" link and provide focus on the search input when it's used. Closes #25592.
Built from https://develop.svn.wordpress.org/trunk@26691


git-svn-id: http://core.svn.wordpress.org/trunk@26581 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Deactivate MP6 on update to 3.8.

If left on, it introduces a lot of weird issues not easily diagnosed. MP6 will be updated before release to prevent itself from functioning 3.8+, but this will cut down on support requests by people who update core but not MP6, which was a fairly popular plugin.

fixes #26334.

Built from https://develop.svn.wordpress.org/trunk@26692


git-svn-id: http://core.svn.wordpress.org/trunk@26582 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Final SVG painter fixes.
 * wp.svgPainter and now moved to wp-admin.
 * Restore !important background-image handling.
 * Delay executing the IE9-specific base64 code if we don't need it.
 * Make painted icons lose their color after hover at the same speed as dashicons (100ms).

props azaozz.
fixes #26333.

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git-svn-id: http://core.svn.wordpress.org/trunk@26583 1a063a9b-81f0-0310-95a4-ce76da25c4cd