Hide radio rssi icon from toolbar if radio is not supported

src/Vehicle/Vehicle.h

@@ -278,6 +278,7 @@ public:
     Q_PROPERTY(bool                 supportsManualControl   READ supportsManualControl                                  CONSTANT)
     Q_PROPERTY(bool        supportsThrottleModeCenterZero   READ supportsThrottleModeCenterZero                         CONSTANT)
     Q_PROPERTY(bool                 supportsJSButton        READ supportsJSButton                                       CONSTANT)
+    Q_PROPERTY(bool                 supportsRadio           READ supportsRadio                                          CONSTANT)
     Q_PROPERTY(bool                 sub                     READ sub                                                    CONSTANT)
     Q_PROPERTY(bool                 autoDisconnect          MEMBER _autoDisconnect                                      NOTIFY autoDisconnectChanged)
     Q_PROPERTY(QString              prearmError             READ prearmError            WRITE setPrearmError            NOTIFY prearmErrorChanged)

src/ui/toolbar/MainToolBarIndicators.qml

@@ -168,6 +168,7 @@ Row {
         id:     rcRssi
         width:  rssiRow.width * 1.1
         height: mainWindow.tbCellHeight
+        visible: activeVehicle ? activeVehicle.supportsRadio : true
         Row {
             id:         rssiRow
             height:     parent.height