Arch: Allow for several IFC properties with same name (in different psets)
Arch: Allow for several IFC properties with same name (in different psets)

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