Revisions JS: Fix inline docs. props a.hoereth. see #23901.

git-svn-id: https://core.svn.wordpress.org/trunk@24253 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Revisions UI: Reduce the min width of a tick. props adamsilverstein. see #23901.

git-svn-id: https://core.svn.wordpress.org/trunk@24254 1a063a9b-81f0-0310-95a4-ce76da25c4cd