Do not grey out the RC symbol in case of known signal loss

src/ui/toolbar/MainToolBarIndicators.qml

@@ -213,7 +213,7 @@ Row {
                 sourceSize.height: height
                 source:         "/qmlimages/RC.svg"
                 fillMode:       Image.PreserveAspectFit
-                opacity:        activeVehicle ? (((activeVehicle.rcRSSI < 1) || (activeVehicle.rcRSSI > 100)) ? 0.5 : 1) : 0.5
+                opacity:        activeVehicle ? (((activeVehicle.rcRSSI < 0) || (activeVehicle.rcRSSI > 100)) ? 0.5 : 1) : 0.5
                 color:          qgcPal.buttonText
                 anchors.verticalCenter: parent.verticalCenter
             }