XML-RPC: Include 'sticky' in the struct returned from metaWeblog.getRecentPosts.

Using wp.getPosts is preferred and non-WP XML-RPC APIs are no longer actively maintained. This is simply for parity with existing MW methods.

props soulseekah.
fixes #26679.

Built from https://develop.svn.wordpress.org/trunk@27553


git-svn-id: http://core.svn.wordpress.org/trunk@27396 1a063a9b-81f0-0310-95a4-ce76da25c4cd
XML-RPC: In wp.editPost, Remove all terms in a taxonomy when an empty array is explicitly passed.

props jstraitiff, maxcutler.
fixes #26686.

Built from https://develop.svn.wordpress.org/trunk@27554


git-svn-id: http://core.svn.wordpress.org/trunk@27397 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Themes screens: Lose search input focus when pressing enter.

This allows the keyboard to close on iOS, for example.

props matveb.
fixes #27233.

Built from https://develop.svn.wordpress.org/trunk@27555


git-svn-id: http://core.svn.wordpress.org/trunk@27398 1a063a9b-81f0-0310-95a4-ce76da25c4cd