Don't start from scale 0
Don't start from scale 0

That would basically incur another gap layer between support and model.

Contributes to issue CURA-4523.

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