refs #420, refs #421 Adjusted FSX driver to emit correct status flags and unloading

* added unload function to disconnect signals / slots and simulator
* changed remote provider to return signal/slot connections to manually disconnect functor connects
* flag so pause can freeze or continue AI aircraft
* slightly changed unload behaviour in simulator context

Remark: Tested for FSX only
Solves #424 for FSX

src/blackcore/context_runtime.h

@@ -158,7 +158,7 @@ namespace BlackCore
         bool parseCommandLine(const QString commandLine, const QString &originator);
 
     private:
-        bool m_init = false; /*!< flag */
+        bool m_init = false; //!< flag
 
         // DBus
         CDBusServer *m_dbusServer = nullptr;