Send out an ApplicationWillTerminateNotification even if the app is shut...

...ting down from a problem.

In particular, I noticed that when the app shuts down from a problem in a migration, this notification is not sent. Why not?

I was tempted to ensure that the notification was not being sent more than once. I would have to register for it and skip my post if it has already gone out. But is this necessary? If not, it simplifies this code considerably, which is always a good thing.