Standardize post format postmeta keys around the ones already used by the Crowd Favorite plugin.

props wonderboymusic. fixes #24010.

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

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