Add save to device support to RGBController

RGBController/RGBController.cpp

@@ -1523,6 +1523,11 @@ void RGBController::UpdateMode()
     CallFlag_UpdateMode = true;
 }
 
+void RGBController::SaveMode()
+{
+    DeviceSaveMode();
+}
+
 void RGBController::DeviceUpdateLEDs()
 {
 
@@ -1557,6 +1562,13 @@ void RGBController::DeviceCallThreadFunction()
     }
 }
 
+void RGBController::DeviceSaveMode()
+{
+    /*-------------------------------------------------*\
+    | If not implemented by controller, does nothing    |
+    \*-------------------------------------------------*/
+}
+
 std::string device_type_to_str(device_type type)
 {
     switch(type)