CURA-4870 Make the Sync button react when the output device changed,

otherwise can show a wrong value (not updated).

resources/qml/Menus/ConfigurationMenu/SyncButton.qml

@@ -98,4 +98,10 @@ Button
         target: Cura.MachineManager
         onCurrentConfigurationChanged: updateOnSync()
     }
+
+    Connections
+    {
+        target: Cura.MachineManager
+        onOutputDevicesChanged: updateOnSync()
+    }
 }