BIM: fix filtering out level issue (#22059)

* Update ifc_status.py

* Update ifc_tools.py

src/Mod/BIM/nativeifc/ifc_status.py

@@ -481,14 +481,12 @@ def filter_out(objs):
             nobjs.append(obj)
         elif obj.isDerivedFrom("Mesh::Feature"):
             nobjs.append(obj)
-        elif obj.isDerivedFrom("App::DocumentObjectGroup"):
+        elif Draft.is_group(obj):
             if filter_out(obj.Group):
                 # only append groups that contain exportable objects
                 nobjs.append(obj)
             else:
                 print("DEBUG: Filtering out",obj.Label)
-        elif obj.isDerivedFrom("Mesh::Feature"):
-            nobjs.append(obj)
         elif obj.isDerivedFrom("App::Feature"):
             if Draft.get_type(obj) in ("Dimension","LinearDimension","Layer","Text","DraftText"):
                 nobjs.append(obj)

src/Mod/BIM/nativeifc/ifc_tools.py

@@ -1598,7 +1598,7 @@ def get_orphan_elements(ifcfile):
 
     products = ifcfile.by_type("IfcProduct")
     products = [p for p in products if not p.Decomposes]
-    products = [p for p in products if not p.ContainedInStructure]
+    products = [p for p in products if not getattr(p, "ContainedInStructure", [])]
     products = [
         p for p in products if not hasattr(p, "VoidsElements") or not p.VoidsElements
     ]