Set default of draft shield height to 10mm
Set default of draft shield height to 10mm

This is a fairly arbitrary default until we have tests from materials. The draft shield height is now only used by the engine if the draft shield is enabled and limited.

Contributes to issue CURA-1295.

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