Delete old autosave if new autosave has same content as the post.

Props nacin. Fixes #7392 for 3.6.

git-svn-id: http://core.svn.wordpress.org/branches/3.6@24879 1a063a9b-81f0-0310-95a4-ce76da25c4cd
New build of SWFUpload that ignores URL query strings. Merges [24880] to 3.6.



git-svn-id: http://core.svn.wordpress.org/branches/3.6@24881 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Make the `show_post_locked_dialog` filter hide both the post locked and post taken over dialogs

props azaozz, DH-Shredder. Fixes #24830 for 3.6.


git-svn-id: http://core.svn.wordpress.org/branches/3.6@24886 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Add missing gettext. This is not a new string; it already exists a few lines up. props alex-ye, fixes #24880.

Merges [24885] to 3.6.



git-svn-id: http://core.svn.wordpress.org/branches/3.6@24887 1a063a9b-81f0-0310-95a4-ce76da25c4cd