COM audio did not tune in (voice room) if channel was already selected at startup

Reason was: hardcoded channel spacing to 8.33kHz

As a result changed to channel spacing based on COM unit, which could also be changed at runtime

* the issue itself was in own aircraft context
* added functions for channel spacing
* changed to COM unit channel spacing (instead of hardcoded spacing)

src/blackgui/editors/cockpitcomform.h

@@ -112,7 +112,7 @@ namespace BlackGui
             void updateActiveCOMUnitLEDs(bool integratedWithSim, bool com1S, bool com1R, bool com2S, bool com2R);
 
             //! Update from simulator context
-            void updateIntegrateFromSimulatorContext();
+            void updateIntegratedFlagFromSimulatorContext();
 
             //! Compare 2 frequencies (consider epsilon)
             static bool isFrequenceEqual(double f1, double f2);