Media Upload: Improve styling of error messages.

props afercia, michalzuber.
fixes #29047.
Built from https://develop.svn.wordpress.org/trunk@29355


git-svn-id: http://core.svn.wordpress.org/trunk@29131 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Attach Media: Display the correct error message when search result is empty.

fixes #29093.
Built from https://develop.svn.wordpress.org/trunk@29356


git-svn-id: http://core.svn.wordpress.org/trunk@29132 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Upgrader: Use always `window.postMessage` for decrement of update count bubbles when `IFRAME_REQUEST` is defined.
Fixes decrement of translation update count bubbles when updated through the bulk upgrader.

fixes #29054.
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git-svn-id: http://core.svn.wordpress.org/trunk@29133 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Language Upgrader: Don't print a footer when translations are updated async.

fixes #28947.
Built from https://develop.svn.wordpress.org/trunk@29358


git-svn-id: http://core.svn.wordpress.org/trunk@29134 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Plugin install: Improve styling of the no results message.

see #28753.
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git-svn-id: http://core.svn.wordpress.org/trunk@29135 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Media: Don't stretch radio and checkbox inputs in compat fields. Adjust margin for radio inputs.

props kovshenin for initial patch.
fixes #28647.
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git-svn-id: http://core.svn.wordpress.org/trunk@29136 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Remove some unused dashboard-widget-* CSS classes. Unused since [9103].

props michalzuber.
fixes #28930.
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git-svn-id: http://core.svn.wordpress.org/trunk@29137 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Add blog_id to the `wp-settings-*` cookie (used for storing user state) to prevent it being overloaded on sub-domain sites. Fixes #29095.
Built from https://develop.svn.wordpress.org/trunk@29362


git-svn-id: http://core.svn.wordpress.org/trunk@29138 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Add an action, `pre_get_users`, in `WP_User_Query::prepare_query()`.

Props rmccue.
Fixes #29084.

Built from https://develop.svn.wordpress.org/trunk@29363


git-svn-id: http://core.svn.wordpress.org/trunk@29139 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Media Modal: Restore uploader view, when no items are found.

see #28963.
Built from https://develop.svn.wordpress.org/trunk@29364


git-svn-id: http://core.svn.wordpress.org/trunk@29140 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Standardize transition-animations on modal close/arrow buttons.

props celloexpressions.
fixes #29021.
Built from https://develop.svn.wordpress.org/trunk@29365


git-svn-id: http://core.svn.wordpress.org/trunk@29141 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Fix CSS for form elements for Firefox 30+, fixes #28500.
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git-svn-id: http://core.svn.wordpress.org/trunk@29142 1a063a9b-81f0-0310-95a4-ce76da25c4cd