Add some missing CSS prefixes. props `grunt autoprefixer:core`.
Built from https://develop.svn.wordpress.org/trunk@27790


git-svn-id: http://core.svn.wordpress.org/trunk@27626 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Set the default font family to inherit (Open Sans) in all TinyMCE modals, change the cursor to pointer when hovering over Quicktags buttons. Props avryl, see #27279
Built from https://develop.svn.wordpress.org/trunk@27791


git-svn-id: http://core.svn.wordpress.org/trunk@27627 1a063a9b-81f0-0310-95a4-ce76da25c4cd