During logout we don't have enough time.

Otherwise rooms cannot be exited properly.

Also, no need to call `_tearDown` in `logOut` when `connection.disconnect` gets
called since it will get called afterwards in the handler.

Most notably, make toolbar same color as chat head and make private chats green
instead of orange.

Otherwise carbons aren't re-enabled after reconnection.

There's nothing about them that's view specific.

Also including css fixes around the unread messages indicator.

Couldn't get it to look/work satisfactorily

This ensures that carbons will be activated again.