Ensure an XML material always has a description and adhesion_info metadata entry
Ensure an XML material always has a description and adhesion_info metadata entry

Contributes to CURA-342

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