Support for confused users in the Select registration option screen

[sesam]

Is your feature request related to a problem? Please describe.
As an unsure user, after doing the SQRL login and then going with the Anonymous option in the registration options screen, then going back, trying Normal, then going back to try to pick anonymous again, the user gets stuck.

Describe the solution you'd like
Several possibilities:

1. Add instructions about the two options. This could include an instruction to not use the Back button that caused my above explained problem.
2. Handle back/forward such that clicking anonymous registration multiple times (with or without reloading / pressing Back and trying Normal then pressing Back again in between) still works as the naive user might wish it to work.
3. Try to prevent Back button, maybe using javascript and trigger a warning like "Do you want to leave the sign in process?"
4. Detect the original problem and just redirect ahead to the website, since the user is presumably already logged in and signed up as an anonymous user already.
5. Use POST with redirect to GET when clicking either of the two registration options buttons, making it more scary and also more expected for the users trying the back button that things might break. My least favorite route :)

Ideas, opinions, pointers to where I could try to make changes to improve this?

Thank you for your time working with this plugin :)