Removing CPs makes surface rational

This occurs in V5 - V7.11:

Directly deleting entire rows of control points from a non-rational surface converts it to rational even though _List reports all weights as 1.

Yeah, I’ve encountered this before, from a different cause though - I can’t remember the reason, I asked at the time but… let me ask again…

RH-66021 Removing surface control points makes it rational

-Pascal was about _RemoveKnot creating rational curves, but not surfaces. Directly deleting control points makes surfaces rational, but not curves.

RH-66021 is fixed in the latest WIP