Load P3D 64 bit SimConnect shared library at runtime

This aligns the behavior and concept with the 32 bit FSX version. SimConnect
is loaded at runtime, depending on the version being selected.
It also adds a featuren to change the P3D SimConnect version at runtime by
unloading the previous and loading a new one.

ref T349

src/plugins/simulator/fsx/simulatorfsx.cpp

@@ -8,6 +8,7 @@
  */
 
 #include "simulatorfsx.h"
+#include "../fsxcommon/simconnectsymbols.h"
 
 using namespace BlackMisc;
 using namespace BlackMisc::Aviation;
@@ -39,5 +40,18 @@ namespace BlackSimPlugin
                 CAircraftIcaoCode("B738", "L2J")
             });
         }
+
+        bool CSimulatorFsx::connectTo()
+        {
+            if (!loadAndResolveFsxSimConnect(true)) { return false; }
+            return CSimulatorFsxCommon::connectTo();
+        }
+
+        void CSimulatorFsxListener::startImpl()
+        {
+            if (!loadAndResolveFsxSimConnect(true)) { return; }
+            return CSimulatorFsxCommonListener::startImpl();
+        }
+
     } // ns
 } // ns

src/plugins/simulator/fsx/simulatorfsx.h

@@ -31,6 +31,11 @@ namespace BlackSimPlugin
                           BlackMisc::Weather::IWeatherGridProvider *weatherGridProvider,
                           BlackMisc::Network::IClientProvider *clientProvider,
                           QObject *parent = nullptr);
+
+            //! \name ISimulator implementations
+            //! @{
+            virtual bool connectTo() override;
+            //! @}
         };
 
         //! Listener for FSX
@@ -41,6 +46,9 @@ namespace BlackSimPlugin
         public:
             //! Constructor
             using CSimulatorFsxCommonListener::CSimulatorFsxCommonListener;
+
+        protected:
+            virtual void startImpl() override;
         };
     } // ns
 } // ns