refs #768, misc adjustments

* changed signature of ownAircraftModelChanged to model
* added function for a reverse lookup of a model (string->model) and use it when model changed
* renamed function to updateByLocalFileNames

src/plugins/simulator/fscommon/simulatorfscommon.cpp

@@ -81,7 +81,7 @@ namespace BlackSimPlugin
                 CAircraftModel newModel(model);
                 newModel.setModelType(CAircraftModel::TypeOwnSimulatorModel);
                 updateOwnModel(newModel);
-                emit ownAircraftModelChanged(getOwnAircraft());
+                emit ownAircraftModelChanged(newModel);
             }
         }