Change application's notification to end once connection established
The application's notification provides interesting feedback about the establishment of the VPN connection. Once the connection is up, however, the system's notification of a running VPN is enough, let's not clutter the notification drawer.
Confirm that removal of our notification will /not/ affect persistance of the connection!
(from redmine: created on 2013-01-25, closed on 2013-06-04)