Add Cost Per Pickaxe As A Column In Pickaxe Overview

Simple UI change that I think may go a long way.

Right now the only way (that I know of) to see cost per pickaxe is to click into each one individually and see the cost.

1st simple request: add individual pickaxe cost to the pickaxe overview screen so we can identify which pickaxes are costing most

2nd more complicated request right now you can select 7 days, 30 days, etc. But you have to do it on each one (users, cost, runs) individually waiting for each one to load. What might make more sense is one date selector that controls every piece of data on that page