Better support for inter-address transactions

[tzarebczan]

lbry.tv users will have a single wallet, and the address page doesn't show amounts correctly when sending change back to itself. The received amount should be adjusted for this as well.

See https://explorer.lbry.com/address/bNAcah588ZCZAmyq879HjCjaPtvqHupjmt

You'd expect to see the sent amounts instead of a negative number. And received should not double count change received.

https://lbryexplorer.tech doesn't show this correctly either.