Use the right offset for object collision after Polygon collision was fixed
Use the right offset for object collision after Polygon collision was fixed

Contributes to #35

hmflash/Cura,ad1217/Cura,lo0ol/Ultimaker-Cura,totalretribution/Cura,markwal/Cura,fieldOfView/Cura,ynotstartups/Wanhao,bq/Ultimaker-Cura,quillford/Cura,markwal/Cura,derekhe/Cura,totalretribution/Cura,senttech/Cura,senttech/Cura,Curahelper/Cura,fxtentacle/Cura,fieldOfView/Cura,DeskboxBrazil/Cura,bq/Ultimaker-Cura,ad1217/Cura,lo0ol/Ultimaker-Cura,DeskboxBrazil/Cura,fxtentacle/Cura,ynotstartups/Wanhao,quillford/Cura,hmflash/Cura,derekhe/Cura,Curahelper/Cura