Show scroll progress on pickers

[Minion3665]

When I'm searching, I'd often like to know how far down the search list I am

Unfortunately, there doesn't seem to be any indicator of this beyond the total number of results and how far I think I might have gone.

I would like helix to display my scroll progress, for example by using a scrollbar on the side of the picker or a page number in the corner (both pictured below)