Added deepcopy function to settingOverrideDecorator
Added deepcopy function to settingOverrideDecorator

CURA-1636

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