[FSX] Signal simulator connected once SIMCONNECT_RECV_OPEN is received

refs #549

src/plugins/simulator/fsx/simulatorfsx.h

@@ -146,6 +146,9 @@ namespace BlackSimPlugin
             void ps_reloadSettings();
 
         private:
+            //! Call this method to declare the simulator connected
+            void setSimConnected();
+
             //! Called when sim has started
             void onSimRunning();