This means that you can go back and edit typed-in values during the wizard

All wizard pages now have the URL /i2ptunnel/wizard

At present the ?page= in the URL isn't affected, which could possibly
confuse users - maybe move to having the page variable as a POST variable
so the url is just always /i2ptunnel/wizard

This means that the form is handled by the same handler as the edit
forms, hopefully reducing maintenance ^_^

    arrow_left, arrow_up, email.png from Silk icons: See licenses/LICENSE-SilkIcons.txt