race condition on message arrival

[lukesmurray]

We previously had the issue that every time a message switched folders we would trigger an on message arrival. We now have a new issue.

Sometimes a message will arrive in one folder during the initial sync but not in other folders. For example it will arrive in Inbox but not Important. When it shows up in Important we trigger an on_message_moved since it looks like the message was moved into important.

not sure what the solution is.