Comment 37 for bug 1068921

Created attachment 675468
call DiscardNewMessage properly, only update size when downloading full message

This includes my previous patch and also keeps track of when we're downloading an entire message, and only updates the message size in the DB on entire message downloads. This patch seems to fix the example message provided with the original report, after manually compacting or repairing the folder.

While testing this I noticed that there is still a form of message that behaves badly whether this patch is applied or not; I attached an example of that message. I haven't debugged that issue yet.