Local autosave: remove the temp cookie after first use. Prevents false negative if the browser crashes. Add some temp logging to aid testing. See #23220

git-svn-id: http://core.svn.wordpress.org/trunk@23705 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Compress scripts/styles: 3.6-alpha-23706.

git-svn-id: http://core.svn.wordpress.org/trunk@23706 1a063a9b-81f0-0310-95a4-ce76da25c4cd