Radial Holes on Conical Faces

Radial New Hole features can now be on a conical face.

The 'Angle' property of Radial holes is the angle between the axis of the hole, and the CPL axis that this intersects. (So for holes in cylindrical faces, 'Angle' is 90°). The Angle value cannot be less than 1° (so 'near-vertical' Radial holes are not found).