Ensure that quality_changes profile is correctly created on profile duplication

I have no idea why it wasn't being created, but it has been wrong for a very long time.

Fixes #8245

cura/Machines/Models/QualityManagementModel.py

@@ -164,10 +164,16 @@ class QualityManagementModel(ListModel):
         quality_group = quality_model_item["quality_group"]
         quality_changes_group = quality_model_item["quality_changes_group"]
         if quality_changes_group is None:
-            # Create global quality changes only.
             new_quality_changes = self._createQualityChanges(quality_group.quality_type, intent_category, new_name,
                                                              global_stack, extruder_stack = None)
             container_registry.addContainer(new_quality_changes)
+
+            for extruder in global_stack.extruderList:
+                new_extruder_quality_changes = self._createQualityChanges(quality_group.quality_type, intent_category,
+                                                                          new_name,
+                                                                          global_stack, extruder_stack=extruder)
+
+                container_registry.addContainer(new_extruder_quality_changes)
         else:
             for metadata in [quality_changes_group.metadata_for_global] + list(quality_changes_group.metadata_per_extruder.values()):
                 containers = container_registry.findContainers(id = metadata["id"])