In transition to Pro I am adding old toolboxes (.tbx) to project and after minor (some not so:( tweaks scripts work fine. There is one thing that bothers me though. In ArcGIS parameter "Field' with option 'Multivalue' and specified Dependency (Obtaned from):

Produces nice flat expanded list of fields:

The same script in ArcGIS Pro produces different interface for multivalue parameter:

I like an old expanded view, but can live with new interface. What bothers me, that some old scripts still manage to maintain flat table view, e.g.:

The unfortunate thing is any attempt to modify parameter, e.g. applying TableView instead of Multivalue followed by apply will never let me go back to expanded view I like. I can again apply Multivalue option etc. to the same parameter, it keeps a new look:

So it is possible to keep an old expanded view. The question is how?