feat: Add support for SpaceMouse mod (6D input knob) (#1853)

Use `-DSPACEMOUSE=YES` CMake option to activate on Horus color targets.
Co-authored-by: Niel Horne (elecpower), Raphael Coeffic (raphaelcoeffic) and Peter Feerick (pfeerick).

radio/src/telemetry/telemetry.cpp

@@ -169,7 +169,7 @@ void telemetryStop()
 {
   if (telemetryTimer) {
     if( xTimerStop( telemetryTimer, 5 / RTOS_MS_PER_TICK ) != pdPASS ) {
-      /* The timer could not be set into the Active state. */
+      /* The timer could not be stopped. */
     }
   }
 }