Use correct variable. see [23575]. see #21767.

git-svn-id: http://core.svn.wordpress.org/trunk@23584 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Compress scripts/styles: 3.6-alpha-23585.

git-svn-id: http://core.svn.wordpress.org/trunk@23585 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Fix checkbox synchronization on Edit Link screen. fixes #23670.

git-svn-id: http://core.svn.wordpress.org/trunk@23586 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Remove unused function. fixes #23671.

git-svn-id: http://core.svn.wordpress.org/trunk@23587 1a063a9b-81f0-0310-95a4-ce76da25c4cd