Correct the icon for the Cura .desktop file
Correct the icon for the Cura .desktop file

Contributes to Ultimaker/Uranium#42

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