Set source IDs to None after removing the source
except when shutting down, because the Control ist destroyed anyway
Only try to remove if we have a source ID
- The 'configure-event' does not trigger anymore when connected to
the MessageTextView. The reason is unknown.
- Use our own ScrolledWindow Widget instead so we can better control
the dimension of the MessageTextView
- Dont add timers when we autojoin minimized
- Remove timers when the chatcontrol gets minimized
- Send inactive chatstate when the chatcontrol gets minimized
- Add timers when the chatcontrol gets maximized