After [29197], use `! empty()` instead of `isset()`. Don't call `has_shortcode()` internally twice if it's true.

Props kovshenin.
Fixes #26343.

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git-svn-id: http://core.svn.wordpress.org/trunk@28991 1a063a9b-81f0-0310-95a4-ce76da25c4cd
After [29106], check for `data.meta` before attempting to render `data.meta.bitrate`.

See #28839.

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git-svn-id: http://core.svn.wordpress.org/trunk@28992 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Merge `wp_handle_upload()` and `wp_handle_sideload()` by making them each wrap a new function: `_wp_handle_upload()`.

Props DrewAPicture for docs.
Fixes #23686.

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git-svn-id: http://core.svn.wordpress.org/trunk@28993 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fourteen: Remove unused variable after [27120].

props michalzuber.
fixes #28928.
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git-svn-id: http://core.svn.wordpress.org/trunk@28994 1a063a9b-81f0-0310-95a4-ce76da25c4cd
TinyMCE: include https://github.com/tinymce/tinymce/commit/709266e308afb89fdfc671b8ef4cfc071790881e that fixes the UI state updates for the "link" button. See #28576.
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git-svn-id: http://core.svn.wordpress.org/trunk@28995 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Media Grid:

Instead of a separate bulk selection mode, persistently show a checkbox for each item. Restores the more familiar bulk actions dropdown + action button.

props ericlewis. see #28842.


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git-svn-id: http://core.svn.wordpress.org/trunk@28996 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Fix jshint errors introduced in [29212]. see #28842.

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git-svn-id: http://core.svn.wordpress.org/trunk@28997 1a063a9b-81f0-0310-95a4-ce76da25c4cd
TinyMCE: add the 'colorpicker' and 'lists' plugins, fixes #28939, #27359.
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git-svn-id: http://core.svn.wordpress.org/trunk@28998 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Declare the variable before using it.

props danielbachhuber.
fixes #28932.
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git-svn-id: http://core.svn.wordpress.org/trunk@28999 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Don't 404 for empty feeds.

fixes #18505.
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git-svn-id: http://core.svn.wordpress.org/trunk@29000 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Use more generic, reusable CSS for the filter bar on Add Themes. This will allow us to reuse the UI in other places, such as the Media Library. props paulwilde. fixes #28794.

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git-svn-id: http://core.svn.wordpress.org/trunk@29001 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Install Plugins screen:

* Utilize the (currently-named) filter bar from the Add Themes screen.
* Move the upload link to the h2, also like the Add Themes screen.

see #28673.

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git-svn-id: http://core.svn.wordpress.org/trunk@29002 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Plugin install cards:

* Move author attribution to its own line.
* Use `esc_url()` where appropriate.
* Better i18n.
* min-height for cards for a more even appearance.
* Show more cards on wide screens.
* Tighten up spacing below the filter bar.

props ocean90, helen. see #28785.

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git-svn-id: http://core.svn.wordpress.org/trunk@29003 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Keyboard accessibility for the media modal:

* Arrow keys navigate between items in the grid.
* Transfer focus into the panel when selecting a tab along the side.
* Transfer focus into the details sidebar when selecting an item and vice versa.
* Set initial focus on the close button so that it is visible.

props celloexpressions, lessbloat, ericlewis. fixes #25100, #25101, #28704. see #23560.

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git-svn-id: http://core.svn.wordpress.org/trunk@29004 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Tie cookies and nonces to user sessions so they may be invalidated upon logout.

Sessions are stored in usermeta via WP_User_Meta_Session_Tokens, which extends the abstract WP_Session_Tokens class. Extending WP_Session_Tokens can allow for alternative storage, such as a separate table or Redis.

Introduces some simple APIs for session listing and destruction, such as wp_get_active_sessions() and wp_destroy_all_sessions().

This invalidates all existing authentication cookies, as a new segment (the session token) has been added to them.

props duck_, nacin, mdawaffe.
see #20276.

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git-svn-id: http://core.svn.wordpress.org/trunk@29005 1a063a9b-81f0-0310-95a4-ce76da25c4cd