Suggestions about changing base currencies

When I changed my base currency to Dash, I noticed that the new wallet was no longer password protected. I realize that it might not be possible to keep the password when changing base currency, but in that case I think the user should receive a message about it, just like there is a message saying that you need to restart the application. That same message could also make it clear that the user has to set a password for the new wallet.

Also, I see in the settings/general preferences that the withdrawal transaction fee is set in satoshi/byte. I think that should be duff/byte since 0.00000001 dash is called a duff, not a satoshi.

Thanks for the report.