Part: fix the mixed newlines of DlgPrimitives.h
Part: fix the mixed newlines of DlgPrimitives.h

My editor, Spyder, detected a mix of Windows and Unix newlines,
and offered to fix the file.

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