Revisions: CSS cleanup, see #24425.

git-svn-id: http://core.svn.wordpress.org/trunk@24574 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Revisions improvements

Revert mouse dragging code which was accidentally removed in [24565].

see #24425.

git-svn-id: http://core.svn.wordpress.org/trunk@24575 1a063a9b-81f0-0310-95a4-ce76da25c4cd