Adds total row to My Liquidity table

[coffee-converter]

Adds a total row to the My Liquidity table, styled like the header, showing totals for liquidity, my liquidity and trade vol. Includes a bit of reorg of the component so as to build up the pool stats to be totaled, separate from building the display rows themselves.

Just thought this would be a nice to have. I find myself tabulating this manually a lot.