PR: Import IFC walls with windows have no system family

### Problem Description

I basically want to import an IFC file. Standard walls (without windows) work perfect.

**Small Test Scenario:** In Revit, I create a wall and add a window and export it to IFC. Then, I import this IFC file again to Revit. What happens is that Revit has not assigned the system family "Basic Wall" to the wall. It just states the family as "Imported Symbol". Furthermore, the wall is not modifiable.

If I do this with an empty wall without any window, then the family and type are correct and equal as before the export and the wall is modifiable.


### Revit Version

2024.0.x

### IFC for Revit Addon Version

24.x.x

### Windows Version

11 22H2

Start by reproducing the reported Revit 2024 scenario with an IFC wall containing a window, then compare it with an empty wall import. Inspect the IFC for Revit import path involved in creating these walls; done means the imported wall receives the expected "Basic Wall" system family and remains modifiable.

Written by the indexing model from the issue text.