auto-detect wallets

[jdogresorg]

Should add some code to detect previously used addresses and re-add them back to the wallet on re-importing the 12-word passphrase.

Can just generate wallet addresses and then check if they have any balance history associated with them... if yes, add to wallet.

This should solve the issue of users re-setting their wallet and then complaining that addresses have disappeared

[davestaxcp]

This would be very helpful. Assuming it will not add "imported" addressed that are not connected with the 12-word phrase, maybe it could be helpful to add a warning popup to notify that is the case when logging out and back in to warn users?