Messages count, new reply and limits problem.

[Kaik]

The previous version of InterCom worked similar to email - every message even reply was an independent message life was easy :)
The current version works slightly different first message acts as a container for conversation it works kind of like topic and posts. This brings few problems to solve.

1. Message count for the user? Just parent messages, all messages and children and how limits should be implied - only parent message or all messages...
2. A new reply should make parent message as unread or new property should be introduced.