Fix message ordering for messages downloaded from iCloud

[tagavari]

AirMessage uses the database ID of messages to sort, though this is reversed when messages are downloaded from iCloud. Another sorting method must be used for these messages.

[valinet]

Any progress on this? I don't really understand why messages can't be sorted using the timestamp... If you say some of them appear out of order when using this, I think it's an acceptable compromise for iCloud downloaded messages, so why not use this sorting in that case and keep the ID-based sorting only for new incoming messages that arrive? Thanks.