Allow "Refresh Linked Aggregate" to be called when uppermost aggregate is selected.

src/bonsai/bonsai/bim/module/aggregate/data.py

@@ -71,11 +71,14 @@ class AggregateData:
     @classmethod
     def total_linked_aggregate(cls) -> Union[int, None]:
         element = tool.Ifc.get_entity(bpy.context.active_object)
-        aggregate = ifcopenshell.util.element.get_aggregate(element)
-        if not aggregate:
-            return
         if not element:
             return
+        aggregate = ifcopenshell.util.element.get_aggregate(element)
+        parts = ifcopenshell.util.element.get_parts(element)
+        if not aggregate and not parts:
+            return
+        if parts:
+            aggregate = element
 
         product_linked_agg_group = next(
             (

src/bonsai/bonsai/bim/module/aggregate/ui.py

@@ -136,7 +136,7 @@ class BIM_PT_linked_aggregate(Panel):
         assert (element := tool.Ifc.get_entity(obj))
         row = layout.row(align=True)
 
-        if element.Decomposes:
+        if element.Decomposes or element.IsDecomposedBy:
             Number_Linked_Aggregates = AggregateData.data["total_linked_aggregate"]
             if not Number_Linked_Aggregates:
                 row.label(text="Not a Linked Aggregate")