Refactor qto utils and migrate to bmesh volume calculation. See #1222.

src/ifcblenderexport/blenderbim/bim/__init__.py

@@ -30,6 +30,7 @@ if bpy is not None:
         "owner": None,
         "project": None,
         "pset": None,
+        "qto": None,
         "search": None,
         "spatial": None,
         "style": None,
@@ -117,10 +118,6 @@ if bpy is not None:
         operator.SelectIfcPatchInput,
         operator.SelectIfcPatchOutput,
         operator.ExecuteIfcPatch,
-        operator.CalculateEdgeLengths,
-        operator.CalculateFaceAreas,
-        operator.CalculateObjectVolumes,
-        operator.AddOpening,
         operator.SetOverrideColour,
         operator.AddDrawing,
         operator.RemoveDrawing,
@@ -198,7 +195,6 @@ if bpy is not None:
         ui.BIM_PT_text,
         ui.BIM_PT_modeling_utilities,
         ui.BIM_PT_annotation_utilities,
-        ui.BIM_PT_qto_utilities,
         ui.BIM_PT_clash_manager,
         ui.BIM_PT_misc_utilities,
         ui.BIM_UL_generic,