A matrix every frame accepts (a rectangular array, plain translations) now needs no
look at the objects, and an empty matrix list never touches the drawing. ARRAYPATH
scans the selection once instead of once per item.
Covered by the existing refusal tests; copy_all is not reachable without a drawing
through any command, so there is no no-drawing test.
ARRAYPATH with align and polar arrays that rotate items refused part way, leaving the earlier copies in the drawing. Every copy's matrix is now checked before the first copy is made. The refusal text names the other unsupported transforms. Test: arraypath_refuses_before_adding_any_copy.
SBaksa