IssueTracker

RecyclerView prefetch is very obtuse, coming from the days of no logging and extremely minimal tracing - both view type and reason for prefetch are not made clear.

We should improve tracing here, at minimum:

- make it clear when prefetch ignores gap deadline, since expected to be used next frame
- show viewtype

Hopefully this will clarify why many prefetches appear invalid. We can add further details as needed.