auth_value length is now checked at 2 events

1. when new selection is made.
2. when auth_value is being typed.
if ssn is selected auth_value is disabled in both.

(in both means, both setup/welcome_ssc and login/page3)
there is a hidden side effect of this choice..

in login/page3 (the edit profile page)
if ssn was selected, auth value will be ssn. then if auth_option is clicked, or auth_value is clicked, whether or not changed it will reset the auth_value to string "SSN as entered ebfore".
which means "update" button click will take them to box position page.

so even a click on ssc configuration boxes will take user to update box position page if the value selected is ssn.
this is not true for rest of the auth_options.