Principled BSDF emission is white per default

[NikolaiVChr]

When creating a new object in blender and it gets assigned Principled BSDF then its emission will be white per default.
This means that people that don't check on that color, will get full emission when exporting.
I could require that strength should be non zero for it to not be black.

Will have to think about it. Suggestions welcome.