New focus style for screen options tabs; make entire tab area clickable; remove the y-offset on form field shadows to match the top-down shadows used everywhere else.

git-svn-id: https://plugins.svn.wordpress.org/mp6/trunk@801318 b8457f37-d9ea-0310-8a92-e5e31aec5664
Added revisions icon to the publish metabox


git-svn-id: https://plugins.svn.wordpress.org/mp6/trunk@801320 b8457f37-d9ea-0310-8a92-e5e31aec5664