TinyMCE: add outline when a button is focused. Fixes #26931, see #24067.
Built from https://develop.svn.wordpress.org/trunk@27058


git-svn-id: http://core.svn.wordpress.org/trunk@26931 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Upgrade MediaElement to 2.13.2 from 2.13.0. For a full list of changes: https://github.com/johndyer/mediaelement/compare/2.13.0...2.13.2

Fixes #26954.


Built from https://develop.svn.wordpress.org/trunk@27059


git-svn-id: http://core.svn.wordpress.org/trunk@26932 1a063a9b-81f0-0310-95a4-ce76da25c4cd