Added more logging to indicate changing of certain containers actually succeeded

cura/Settings/MachineManager.py

@@ -544,6 +544,7 @@ class MachineManager(QObject):
 
         material_index = self._active_container_stack.getContainerIndex(old_material)
         self._active_container_stack.replaceContainer(material_index, material_container)
+        Logger.log("d", "Active material changed")
 
         material_container.nameChanged.connect(self._onMaterialNameChanged)
 
@@ -588,7 +589,7 @@ class MachineManager(QObject):
             self.blurSettings.emit()
             variant_index = self._active_container_stack.getContainerIndex(old_variant)
             self._active_container_stack.replaceContainer(variant_index, containers[0])
-
+            Logger.log("d", "Active variant changed")
             preferred_material = None
             if old_material:
                 preferred_material_name = old_material.getName()