Ledger browser performance with high number of transactions

[esune]

As the number of transactions on the ledger grows, the ledger browser struggles more and more to execute queries filtering the data based on the requested parameters.

In particular, we are noticing on BCovrin Test that performance is VERY poor, and at times leads the browser to become unresponsive.

Some notes about this here: bcgov/traction#650 (comment)