List output types broken with recent changes

Looks like 6fc7314 and then b9b178b changed input widget types in a way that breaks other nodes (changes seemed to only consider the PrimitiveNode, maybe?).

FWIW, a better type system for arrays would be great, but I think consideration needs to be taken to not churn and break nodes with array types already.

The problem currently lies in a Python configured node still outputs array types as a joined list; but the changes in the commits above create a new type for list widgets converted to inputs, which is now not compatible.