Read setting_version from version attribute on root
Read setting_version from version attribute on root

As per the new specification for v1.3 of the spec.

Contributes to issue CURA-3427.

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