Arch: Fixed duplicate IfcSurfaceStyle names in IFC export
Arch: Fixed duplicate IfcSurfaceStyle names in IFC export

Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master