Show rank in token holders and compare with rank from week/month/year ago

[modersohn]

To actually compare the rank change within a time frame we would need to switch the query to always only query for fixed set of holders (100 maybe?). We would then need to switch to the built-in pager, but this would require some effort if we still want the page number as a page param for browser history.

Then one could do a second query of top holders with a block-height that corresponds to the desired time-frame (chosen from a drop down). This would need to be a parameter of the page, separate cache etc.

Then getting the rank as index in the list and the previous rank by finding the account in the second list.