A Box cut, or a Cylinder cut whose axis is the sheet's normal, machines a sheet metal body like the extrude cut of its footprint: through the sheet it's a cut-out (a cylinder an exact round one in the flat pattern and DXF), part way it's a pocket. Primitives at other angles or across a bend are still refused. Un-ignores the #541 regression test. Fixes#541.
Co-authored-by: jonaswre <jonas.wrede@beyondit.gmbh>
Jonas Wrede
94ab54d1f5