Auto-expand the menus accordion if JavaScript is disabled. fixes #24402.

git-svn-id: http://core.svn.wordpress.org/trunk@24348 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Compress scripts/styles: 3.6-beta3-24349.

git-svn-id: http://core.svn.wordpress.org/trunk@24349 1a063a9b-81f0-0310-95a4-ce76da25c4cd