Remove ± rank from nested view, add absolute rank in flat view

- Ranks won or lost are meaningless without the actual absolute rank. Going from 1st to 2nd is **vastly** different than going from 350th to 351st.
- Relative ranks presented in isolation make no sense (until you hover, which adds effort)
- Ranks don't make much sense for nested data, in fact determining rank was the primary purpose of the flat view.

I propose:
- Remove ranks entirely from the nested view
- Add absolute rank in the flat view
- Move relative rank together with absolute rank, perhaps something like this:

Start by locating the components that render ranks in the nested and flat views, then trace how relative rank values are supplied to them. Compare the current behavior with the proposal and screenshots: nested views should show no ranks, while flat views should show absolute and relative rank together. Verify both view modes and relevant responsive layouts manually.

Written by the indexing model from the issue text.