Tables need to be optimized to remove jankiness

## Problem:
- Edit Validators select/deselect taking more than 200ms just for click response
- Selected / Edit Validator infinite routing loop
- Switching clicks on the network detail page take 250ms
- Sorting UX in tables

## Possible solution
Use a virtualized list library instead of coding our table like https://bvaughn.github.io/react-virtualized/#/components/List

Start by profiling the Edit Validators interactions and the network detail page, then inspect how the tables handle selection, routing, and sorting. Compare the current table behavior with the linked react-virtualized List example. Done means the listed interactions no longer exhibit the reported delays or infinite routing loop and table sorting remains usable.

Written by the indexing model from the issue text.