Send polygons only after we've had a chance to add all of them
Send polygons only after we've had a chance to add all of them

alephobjects/CuraEngine,alex1818/CuraEngine,electrocbd/CuraEngine,fxtentacle/CuraEngine,markwal/CuraEngine,pratikshashroff/pcura,patrick3coffee/CuraTinyG,foosel/CuraEngine,patrick3coffee/CuraTinyG,ROBO3D/CuraEngine,mspark93/CuraEngine,Ultimaker/CuraEngine,derekhe/CuraEngine,mspark93/CuraEngine,alephobjects/CuraEngine,pratikshashroff/pcura,electrocbd/CuraEngine,markwal/CuraEngine,derekhe/CuraEngine,totalretribution/CuraEngine,uus169/CuraEngine,totalretribution/CuraEngine,jacobdai/CuraEngine-1,foosel/CuraEngine,fxtentacle/CuraEngine,pratikshashroff/pcura,totalretribution/CuraEngine,foosel/CuraEngine,uus169/CuraEngine,electrocbd/CuraEngine,alephobjects/CuraEngine,alex1818/CuraEngine,ROBO3D/CuraEngine,jacobdai/CuraEngine-1,ROBO3D/CuraEngine,mspark93/CuraEngine,fxtentacle/CuraEngine,patrick3coffee/CuraTinyG,uus169/CuraEngine,Ultimaker/CuraEngine,alex1818/CuraEngine,derekhe/CuraEngine,markwal/CuraEngine,jacobdai/CuraEngine-1