Inconsistent highlights in query windows

[xPaw]

When I fixed highlights to be handled on the server, it somewhat broke the query window behaviour.

Currently it acts as if it were a channel (only nick mentions highlight), but also highlight the first message when the window is created.

I think easiest solution would be to set highlight on all incoming message if they arent self, and then don't apply highlight class on the client in query windows. This approach would also remove highlights on your nick since that's a bit useless in query windows.