[bug] balance increments when changing electrum server settings

[MattDHill]

Sometimes, when switching between a personal electrum server and the default electrum server, or when enabling/disabling Tor, the displayed "Total Bitcoin Balance" increases. It seems to increase by the agreggate of the received txs.

I have been unable to reproduce the behavior in a reliable way, but now, regardless of what electrum server I connect to, my balance is displaying about 10-11x what it actually is, and there doesn't seem to be a way to reset/rescan without nuking the wallet and recovering fresh.