Widget Customizer: Fix shift+click issue in Firefox to open a widget.

props westonruter.
see #27358.
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git-svn-id: http://core.svn.wordpress.org/trunk@27540 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Widget Customizer: Improve widget highlighting.

* Prefix box-shadow in inject_preview_css()
* Remove border-radius in inject_preview_css()
* Prevent hidden box-shadows in Customizer

see #27358.
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git-svn-id: http://core.svn.wordpress.org/trunk@27541 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Custom backgrounds: Do not print the default background color when it has been saved to the DB.

props obenland.
fixes #22030.

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git-svn-id: http://core.svn.wordpress.org/trunk@27542 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Custom backgrounds: Always cause a preview in the customizer.

Omitted from [27703].

props obenland.
see #22030.

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git-svn-id: http://core.svn.wordpress.org/trunk@27543 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Update Dashicons.

* Includes new Media icons, see #26650.
* Includes icons for clipboard, megaphone, schedule, tickets, nametag, universal-access, microphone and <3.
* Includes icon for randomize, see #21785.
* Updates Google+ icon, fixes #26851.

props melchoyce, empireoflight.
see #26936.
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git-svn-id: http://core.svn.wordpress.org/trunk@27544 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Multisite: Don't set the $super_admins global in grant_super_admin(), revoke_super_admin().

Adds tests and docs.

props jdgrimes.
see #27205.

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git-svn-id: http://core.svn.wordpress.org/trunk@27545 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Allow XML attributes with colons to be read by kses.

The attribute would still need to be whitelisted to get through the filters.

props jorbin.
fixes #17847.

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Clarify the return value of wp_generate_tag_cloud().

props SergeyBiryukov, DrewAPicture.
fixes #27487.

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git-svn-id: http://core.svn.wordpress.org/trunk@27547 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Gracefully fail in wp_generate_tag_cloud() when emptiness is returned from the tag_cloud_sort filter.

props SergeyBiryukov.
fixes #27413.

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git-svn-id: http://core.svn.wordpress.org/trunk@27548 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Encode spaces in get_template_directory_uri() and get_stylesheet_directory_uri().

props SergeyBiryukov.
fixes #21969.

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git-svn-id: http://core.svn.wordpress.org/trunk@27549 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Restore the update message in the dashboard, removed in 3.8.

props obenland.
fixes #26664.

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git-svn-id: http://core.svn.wordpress.org/trunk@27550 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Don't allow the image editor thumbnail to be dragged. see #21811.

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git-svn-id: http://core.svn.wordpress.org/trunk@27551 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Back compat for overriding window.autosave.

props azaozz.
fixes #25272.

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git-svn-id: http://core.svn.wordpress.org/trunk@27552 1a063a9b-81f0-0310-95a4-ce76da25c4cd
3.9-beta2-27714

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git-svn-id: http://core.svn.wordpress.org/trunk@27553 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Network Admin: Fix pagination on site-themes and site-users.

props kawauso, jeremyfelt.
fixes #17545.

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git-svn-id: http://core.svn.wordpress.org/trunk@27554 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Theme compat: Move <head profile> to <link>.

props spmlucas.
fixes #24523.

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git-svn-id: http://core.svn.wordpress.org/trunk@27555 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Ensure the $path is trailing-slashed in domain_exists().

props ejdanderson, ericmann.
fixes #18209.

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git-svn-id: http://core.svn.wordpress.org/trunk@27556 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Transients: Allow a non-expiring transient to be updated with an expiry.

props shahpranaf, sandyr.
fixes #22807.

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git-svn-id: http://core.svn.wordpress.org/trunk@27557 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Popular tags' edit links should respect the current post type. Adds unit test.

Props mordauk, fahmiadib.
Fixes #25566.


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git-svn-id: http://core.svn.wordpress.org/trunk@27558 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Use dashicons in header images in the customizer.

props mcsf.
see #21785.

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git-svn-id: http://core.svn.wordpress.org/trunk@27559 1a063a9b-81f0-0310-95a4-ce76da25c4cd