Ref T232 clear remote aircraft data once network disconnects

* blackconfig in .pro
* verify function to detect dangling states
* clear remote data when disconnected from network
* there was one problem that the data where not correctly cleaned up and hence new aircraft where not added again after a disconnect/reconnect from network
* it is not yet clear why data happens (dangling data), that is what the debugVerify function is for

src/blackcore/context/contextsimulator.h

@@ -115,6 +115,9 @@ namespace BlackCore
             //! A weather grid, requested with requestWeatherGrid(), is received
             void weatherGridReceived(const BlackMisc::Weather::CWeatherGrid &weatherGrid, const BlackMisc::CIdentifier &identifier);
 
+            //! Relevant simulator messages to be explicitly displayed
+            void driverMessages(const BlackMisc::CStatusMessageList &messages);
+
         public slots:
             //! Simulator info, currently loaded plugin
             virtual BlackMisc::Simulation::CSimulatorPluginInfo getSimulatorPluginInfo() const = 0;