fix: cone angle sign inverted: more sensible fix (CURA-869)
fix: cone angle sign inverted: more sensible fix (CURA-869)

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