Allow lag/lead on multiple columns at once

Sean_Tully

I think it would be helpful to be able to lag/lead on multiple columns at once, as long as the partition and ordering are the same. We have multiple ETLs where we have to lag/lead many columns, and having to create a tile for each column doesn't feel very efficient.

Thanks!

AndreaLovesData

Good idea! I will review this with the team.