Revisions UI: Disable previous and next buttons when you're on the first, and last node. Put revision ticks above the slider range. props lessbloat for initial patch. see #23899.

git-svn-id: http://core.svn.wordpress.org/trunk@24020 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Standardize post format postmeta keys around the ones already used by the Crowd Favorite plugin.

props wonderboymusic. fixes #24010.

git-svn-id: http://core.svn.wordpress.org/trunk@24021 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Compress scripts/styles: 3.6-beta1-24021.

git-svn-id: http://core.svn.wordpress.org/trunk@24022 1a063a9b-81f0-0310-95a4-ce76da25c4cd