Make the order of insert tools consistent in dialogs

The promote/demote rules in mw.Target had changed, but these changes
weren't copied to MWMediaEditDialog and MWReferenceDialog.

Also, we ideally shouldn't need to maintain these things
completely separately from each other.

Bug: 62286
Change-Id: I459c3310f2ac0d8860a686a05da4f45d9a888801
Merge "Make the order of insert tools consistent in dialogs"