Ref T246, functions to access values of model loader/models component

* direct access to simulator settings
* load models for simulator

src/blackgui/components/dbownmodelscomponent.h

@@ -105,6 +105,9 @@ namespace BlackGui
             //! Access to model loader
             BlackMisc::Simulation::IAircraftModelLoader *modelLoader() const;
 
+            //! Forced read for given simulator
+            bool requestModelsInBackground(const BlackMisc::Simulation::CSimulatorInfo &simulator, bool onlyIfNotEmpty);
+
             //! Graceful shutdown
             void gracefulShutdown();