[FIXED] More careful Core Data threading and context usage.
[FIXED] iOS bug when migrating, now using USM's copy migration.
[ADDED] Better handling of store changes while in Main VC and Element List VCs.
[UPDATED] Made activeUser access follow same pattern as activeElement which makes it more clear what the thread model is like.
[FIXED] Save after update of all elements.
[UPDATED] Tool tips hidden in IB now; makes it less cluttered.
[FIXED] Dismissing view controllers when logging out.