Start webauthn-authentication directly

[phavekes]

This issue is imported from pivotal - Originaly created at Mar 14, 2023 by Peter Havekes

Previously, a gesture was required to start the webauthn-authentication on IOS devices, but Apple has adjusted it's opinion on this. A tab can now initiate 1 authentication request without gesture
https://twitter.com/rmondello/status/1583243845164142592?s=20

Change the webauth-gssp to start the javascript call directly when opend, but keep the button action to retry

This will partly revert #56