Notify administrators of successful, failed, and pending core updates.

Blocks future background updates after critical failures, but allow retries in certain situations. More in the ticket.

fixes #10787.

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Use full paths to images so they work on wp-admin/network/about.php and user/about.php. see #25603.

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Use correct variable. fixes #10787.

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git-svn-id: http://core.svn.wordpress.org/trunk@25755 1a063a9b-81f0-0310-95a4-ce76da25c4cd
CSS cleanup for the about page.

Also fixes for IE and support for RTL.

see #25603.
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About page: Use box-sizing: border-box on the password meter so pixels line up.

Also eliminates a duplicate width: 100% property.

fixes #25603.

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IE7: Fix width of the password input field on the about page. see #25603.
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Since we're dealing with a huge password meter, don't bold half of the result strings unnecessarily. see #25603.

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About page: Prevent the meter from briefly sticking on 'Strong' when the animation resets.

props jorbin.
see #25603.

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Vendor-prefixes for [25845]. props jorbin. see #25603.
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3.7-RC1

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Commit [25823] should not have renamed AUTOMATIC_UPDATER_DISABLED to AUTOMATIC_UPDATES_DISABLED.

The proper constant is AUTOMATIC_UPDATER_DISABLED. Keep the filter in line with that too.

see #22704.

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TinyMCE: fix detection of IE11 in compatibility mode, fixes #25634.
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