Post locks: use heartbeat to dynamically update locked posts on the Posts screen, first run, see #23312

git-svn-id: http://core.svn.wordpress.org/trunk@23487 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Add edit-post.min.js for bumpbot's sake, see #23312

git-svn-id: http://core.svn.wordpress.org/trunk@23488 1a063a9b-81f0-0310-95a4-ce76da25c4cd