Alright, CollectionMassiveNameActivity is (pretty much) done! Technically
I've punted on the "move a collection" option for now, but I'll get back
to it later - I'm frankly too frustrated with dialog boxes to hook up two
more of them right now.

Next: either refactor the class and the database manager to use the proper
data model go-between (probably should do that) or start hooking up the
Collection-Card-Browser bit.