Sketcher: [skip ci] fix computing of hotspot of sketcher icons on macOS
Sketcher: [skip ci] fix computing of hotspot of sketcher icons on macOS

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