Correct problem where face split inadvertently triggered the un-triangulate detection logic in places due to freshly added diagonals. Defer face split until after tagging is complete so the new edges don't interfere with edge counting. Ref !141511
Correct problem where face split inadvertently triggered the un-triangulate detection logic in places due to freshly added diagonals. Defer face split until after tagging is complete so the new edges don't interfere with edge counting. Ref !141511