Fixing https://github.com/daid/Cura/issues/820
Fixing https://github.com/daid/Cura/issues/820

patrick3coffee/CuraTinyG,phonyphonecall/CuraEngine,Skeen/CuraJS-Engine,Ultimaker/CuraEngine,Jwis921/PersonalCuraEngine,be3d/CuraEngine,alephobjects/CuraEngine,daid/CuraCutEngine,foosel/CuraEngine,mspark93/CuraEngine,derekhe/CuraEngine,Jwis921/PersonalCuraEngine,uus169/CuraEngine,electrocbd/CuraEngine,jacobdai/CuraEngine-1,foosel/CuraEngine,phonyphonecall/CuraEngine,robotustra/curax,alex1818/CuraEngine,fxtentacle/CuraEngine,foosel/CuraEngine,alephobjects/CuraEngine,Jwis921/PersonalCuraEngine,totalretribution/CuraEngine,totalretribution/CuraEngine,markwal/CuraEngine,Ultimaker/CuraEngine,markwal/CuraEngine,electrocbd/CuraEngine,robotustra/curax,pratikshashroff/pcura,mspark93/CuraEngine,markwal/CuraEngine,fxtentacle/CuraEngine,totalretribution/CuraEngine,robotustra/curax,Skeen/CuraJS-Engine,derekhe/CuraEngine,be3d/CuraEngine,ROBO3D/CuraEngine,uus169/CuraEngine,daid/CuraCutEngine,jacobdai/CuraEngine-1,fxtentacle/CuraEngine,alex1818/CuraEngine,electrocbd/CuraEngine,alex1818/CuraEngine,uus169/CuraEngine,ROBO3D/CuraEngine,patrick3coffee/CuraTinyG,jacobdai/CuraEngine-1,be3d/CuraEngine,ROBO3D/CuraEngine,pratikshashroff/pcura,patrick3coffee/CuraTinyG,phonyphonecall/CuraEngine,mspark93/CuraEngine,alephobjects/CuraEngine,pratikshashroff/pcura,Skeen/CuraJS-Engine,derekhe/CuraEngine