Remove attachment_url_to_postid(). props kovshenin, wonderboymusic. see #24458. 



git-svn-id: https://core.svn.wordpress.org/trunk@24548 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Revisions UI update:

* Restore Compare two mode
* Restore tooltips
* RTL support
* First pass for URL routing and history

props adamsilverstein, see #24425.

git-svn-id: https://core.svn.wordpress.org/trunk@24549 1a063a9b-81f0-0310-95a4-ce76da25c4cd