Noticed the issue adding IfcFurnitureType in IFC2x3
```
Traceback (most recent call last):
File "\Blender\4.0\scripts\addons\blenderbim\bim\module\model\workspace.py", line 71, in draw_settings
BimToolUI.draw(context, layout, ifc_element_type="all")
File "\Blender\4.0\scripts\addons\blenderbim\bim\module\model\workspace.py", line 230, in draw
AuthoringData.load(ifc_element_type)
File "\Blender\4.0\scripts\addons\blenderbim\bim\module\model\data.py", line 56, in load
cls.data["predefined_type"] = cls.predefined_type()
File "\Blender\4.0\scripts\addons\blenderbim\bim\module\model\data.py", line 258, in predefined_type
predefined_type = relating_type.PredefinedType
File "\Blender\4.0\scripts\addons\blenderbim\libs\site\packages\ifcopenshell\entity_instance.py", line 191, in __getattr__
raise AttributeError(
AttributeError: entity instance of type 'IFC2X3.IfcFurnitureType' has no attribute 'PredefinedType'
```
It was providing project units to `geometry.add_slab_representation` resulting and then they were converted to project units once again during `geometry.add_slab_representation`.
data.py doesn't update on every undo, so passed blender objects got invalidated on undo resulting in errors. changed blender objects to blender object names
The problem with that attribute was that object's and project's group ui section were both using groups loaded to BIMGroupProperties.groups.
So you could run into situation when you try to load object's groups ui and it would show empty list because user never loaded the groups from the project's ui...
So it was either caching groups twice or just using same `is_editing` flag to check whether groups were previously loaded and I went with the single flag.
Hi,
I noticed an issue and suggest a fix:
Unit names from <si_conversions> are all lowercase, whereas project units extracted from the IFC files with <get_project_unit(...).Name> are uppercase. So the convert function didn't seem to work properly.
Hope this helps!
Andrej730