Own model set component

* Removed changeSimulator function in model set component (merged with setSimulator)
* menu to clear caches
* remember simulator "in selector", not in own value

src/blackgui/components/dbownmodelsetcomponent.h

@@ -153,9 +153,6 @@ namespace BlackGui
             //! Copy from another swift version
             void copyFromAnotherSwift();
 
-            //! Unchecked version of setSimulator
-            void changeSimulator(const BlackMisc::Simulation::CSimulatorInfo &simulator);
-
             //! Show the airline/aircraft matrix
             void showAirlineAircraftMatrix() const;