Relax warning value for support interface thickness
Relax warning value for support interface thickness

It was being violated by the superdraft profiles. With very thick layers, 2 layers of interface suffices. But 2 layers is not quite enough for very thin layers. So I'm making it scale a bit more slowly with an offset.

Contributes to issue CURA-3650.

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