WPDB: When removing invalid characters from utf8 strings in older versions of PHP, the regex was too large to be compiled.

See #21212

Built from https://develop.svn.wordpress.org/trunk@30366


git-svn-id: http://core.svn.wordpress.org/trunk@30365 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Add a missing `@return` description for `WP_Screen::get_option()`.

Also declare the default value for the `$key` parameter.

Props dustyf for the initial patch.
Fixes #30363.

Built from https://develop.svn.wordpress.org/trunk@30368


git-svn-id: http://core.svn.wordpress.org/trunk@30366 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Fix parameter description syntax for `WP_Screen::get_option()`.

Props zrothauser for the initial patch.
See [30368]. Fixes #30363.

Built from https://develop.svn.wordpress.org/trunk@30369


git-svn-id: http://core.svn.wordpress.org/trunk@30367 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Add inline `@see` tags to the docs for the `get_categories_taxonomy` hook.

Props tw2113.
Fixes #30310.

Built from https://develop.svn.wordpress.org/trunk@30370


git-svn-id: http://core.svn.wordpress.org/trunk@30368 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Ten, Eleven, Thirteen: add bottom margin to audio and video players.

Fixes #29146. Props mikeyarce, gregrickaby, DavidTheMachine, jeanyoungkim, ccprice.

Built from https://develop.svn.wordpress.org/trunk@30371


git-svn-id: http://core.svn.wordpress.org/trunk@30369 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fifteen: pinking shears.

Built from https://develop.svn.wordpress.org/trunk@30372


git-svn-id: http://core.svn.wordpress.org/trunk@30370 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Improve keyboard control of Edit Selection mode in the media manager.

See #29326
Props adamsilverstein

Built from https://develop.svn.wordpress.org/trunk@30374


git-svn-id: http://core.svn.wordpress.org/trunk@30371 1a063a9b-81f0-0310-95a4-ce76da25c4cd
WPDB: When a `db.php` drop-in is being used, and it doesn't explicitly define itself as connecting to MySQL, skip the character set checks. This ensures that existing drop-ins won't accidentally run checks that they don't support.

See #21212.

Built from https://develop.svn.wordpress.org/trunk@30375


git-svn-id: http://core.svn.wordpress.org/trunk@30372 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Improve Thickbox's close button so it can be announced by screen readers.

Fixes #29455
Props SergeyBiryukov

Built from https://develop.svn.wordpress.org/trunk@30376


git-svn-id: http://core.svn.wordpress.org/trunk@30373 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Avoid re-registering the `keydown` event controller in the media grid so arrow controls don't skip media items.

Fixes #30348
Props UmeshSingla

Built from https://develop.svn.wordpress.org/trunk@30377


git-svn-id: http://core.svn.wordpress.org/trunk@30374 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Update the inline docs for the `keyEvent` callback in the media grid.

Props adamsilverstein
See #29725

Built from https://develop.svn.wordpress.org/trunk@30378


git-svn-id: http://core.svn.wordpress.org/trunk@30375 1a063a9b-81f0-0310-95a4-ce76da25c4cd