Expand and collapse items in a grid

[AnaplanIdeas]

As an mobile builder and as an end-user

I want to expand and collapse hierarchy rollups and line item summaries

So that I can more easily consume grid data.

[Rebecca]

Update from the Product team: We are investigating implementation options for this.

[tara.norris]

Any update on this one? 

[rhernandezcwp]

Please this add this functionallity, this really necessary