Provide a RevisionRecord with the correct title after a move

Provide a RevisionRecord with the correct title after a move

Currently we're creating the null revision for the move before actually
updating the page's title, so when it gets passed through
RevisionRenderer the output uses the old page's title in the <h1>.

To make that null revision have the correct title, let's try simply
updating the page table before creating it instead. The ordering
shouldn't matter since this all happens in an atomic section.

Bug: T203661
Change-Id: I9ebdcbc566b11dea3a9bdd402ea4418c4e51b096