Bug Description

Notify OSD should watch the different clients that sent notifications on DBus. If the client drops off DBus Notify OSD should expire the notifications more quickly than it would otherwise. In many cases this is because the application has crashed or been closed explicitly. All of the notifications can't be destroyed because in many cases the notification could be sent by notify-send which exits immediately, and would be detected as leaving the bus. I would suggest limiting the number to 2, and expiring those quickly if the application leaves the bus.