Add start & end gcode to UM2 depending on gcode flavor
Add start & end gcode to UM2 depending on gcode flavor

CURA-580

Curahelper/Cura,senttech/Cura,hmflash/Cura,ynotstartups/Wanhao,fieldOfView/Cura,senttech/Cura,Curahelper/Cura,hmflash/Cura,fieldOfView/Cura,totalretribution/Cura,totalretribution/Cura,ynotstartups/Wanhao