Fix SimulationView onSceneChanged signal binding

CURA-5130

plugins/SimulationView/SimulationView.py

@@ -74,7 +74,7 @@ class SimulationView(View):
 
         self._global_container_stack = None
         self._proxy = SimulationViewProxy()
-        self._controller.getScene().getRoot().childrenChanged.connect(self._onSceneChanged)
+        self._controller.getScene().sceneChanged.connect(self._onSceneChanged)
 
         self._resetSettings()
         self._legend_items = None