JSON fix: resolveOrValue for retraction_combing (CURA-2410)
JSON fix: resolveOrValue for retraction_combing (CURA-2410)

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