Avoid racing TinyMCE, which avoids the creation of unnecessary autosaves. props azaozz. see #7392, for 3.6.

git-svn-id: https://core.svn.wordpress.org/branches/3.6@24852 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Tooltips for 3.6 features: Revisions, Post Locking.

Props siobhan. See #24832 for 3.6.

git-svn-id: https://core.svn.wordpress.org/branches/3.6@24854 1a063a9b-81f0-0310-95a4-ce76da25c4cd