bugfix: max wipe tower height when using support roofs
bugfix: max wipe tower height when using support roofs

patrick3coffee/CuraTinyG,fxtentacle/CuraEngine,pratikshashroff/pcura,alex1818/CuraEngine,totalretribution/CuraEngine,markwal/CuraEngine,alephobjects/CuraEngine,fxtentacle/CuraEngine,alephobjects/CuraEngine,pratikshashroff/pcura,patrick3coffee/CuraTinyG,Ultimaker/CuraEngine,alephobjects/CuraEngine,markwal/CuraEngine,Ultimaker/CuraEngine,totalretribution/CuraEngine,fxtentacle/CuraEngine,mspark93/CuraEngine,uus169/CuraEngine,totalretribution/CuraEngine,markwal/CuraEngine,ROBO3D/CuraEngine,alex1818/CuraEngine,patrick3coffee/CuraTinyG,mspark93/CuraEngine,alex1818/CuraEngine,ROBO3D/CuraEngine,mspark93/CuraEngine,pratikshashroff/pcura,uus169/CuraEngine,uus169/CuraEngine,ROBO3D/CuraEngine