encourage users to put their master password in web gen and not in the web form

I would like to see a feature to encourage users to put their master password in web gen and not in the web form first (although I like the web form first trick too).

Program the super gen to update the web page's password fields on every keypress in the master password.  In this way, one can simply submit on the web form to login.  This removes the one-step-penalty imposted by super gen's submit button.