CURA-1923: Slicinfo: Using UM.Job instead
CURA-1923: Slicinfo: Using UM.Job instead

As suggested by @awhiemstra handling our "thread" here should be done
with UM.Job.
hmflash/Cura,Curahelper/Cura,ynotstartups/Wanhao,ynotstartups/Wanhao,hmflash/Cura,totalretribution/Cura,totalretribution/Cura,senttech/Cura,fieldOfView/Cura,fieldOfView/Cura,senttech/Cura,Curahelper/Cura