Custom data column UI for customField of type relation

[BijanRegmi]

Is your feature request related to a problem? Please describe.
Currently, the data column shows an object tree for fields of relation type. For example, if I had a customField asset in a orderLine then the asset would be shown as object tree in the orderLine table.

Describe the solution you'd like
It would be better if the user could define their own UI for such fields.

Describe alternatives you've considered
At the moment, I've considered registering a DetailComponent in the order detail page and show a custom table with my own UI implementation.

Additional context
Screenshot:

[michaelbromley]

Will be available in v2.1. You can test this out on the @next release tag.