fix: parsing of temp flow graph was buggy ==> rewrite (CURA-1792)
fix: parsing of temp flow graph was buggy ==> rewrite (CURA-1792)

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