Custom material now defaults to PLA.
Custom material now defaults to PLA.

This is not an ideal solution, but it bandaids a problem for the moment.

CURA-3911

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