Issue 3610: Bookmarks: Pending moderator approval visible to all users

Resolves issue: http://code.google.com/p/otwarchive/issues/detail?id=3610

* The flash notice is now only displayed to the Bookmark owner. 
* The <code>Bookmarker's Collections: </code> line only show collections which have approved the Bookmark when viewing the Bookmark as a **non-owner**.

Includes tests, for Great Victory!