chatview: navbar present during call if peer sends a message
How to reproduce:
- User A (any client) calls user B (GNU/Linux GNOME client, latest master)
- User B accepts the call. User A and B are now able to communicate
- At some point user A sends a message to user B
- User B receives the message and the chatview pops at the right side of the screen.
- First bug: The chatview has a navbar and it should not.
- Second bug: Received message is not present.
