Fix #560: id_properties_ui corruption

Work around the issue by clearing the properties before updating them.

The root cause is already fixed in Blender 4.3 and will be fixed in 4.2.3
https://projects.blender.org/blender/blender/issues/127952

BlenderMalt/MaltProperties.py

@@ -376,7 +376,9 @@ def resize():
                 if ui_key in rna_prop and rna_prop[ui_key] is not None:
                     ui_properties[ui_key] = rna_prop[ui_key]
 
-            self.id_properties_ui(key).update(**ui_properties)
+            ui = self.id_properties_ui(key)
+            ui.clear()
+            ui.update(**ui_properties)
 
         # Force a depsgraph update. 
         # Otherwise these won't be available inside scene_eval