git-svn-id: http://core.svn.wordpress.org/trunk@21406 1a063a9b-81f0-0310-95a4-ce76da25c4cd
RTL version and tweaks to come after more testing. git-svn-id: http://core.svn.wordpress.org/trunk@21389 1a063a9b-81f0-0310-95a4-ce76da25c4cd