Correct tip direction for different Z gaps
Correct tip direction for different Z gaps

Because the tip starts lower, we'd think that the tip should be in a different direction because the skin above that tip has a different direction, but that's not the case since it should be orthogonal to the skin ABOVE the support Z distance.

Contributes to issue CURA-4523.

ROBO3D/CuraEngine,Ultimaker/CuraEngine,alephobjects/CuraEngine,alephobjects/CuraEngine,Ultimaker/CuraEngine,alephobjects/CuraEngine,ROBO3D/CuraEngine,ROBO3D/CuraEngine