🐛 [firebase_ui] add email verification timeout

[lesnitsky]

Add a way to recover from a state where the UI doesn't know that email was verified on a different device.

[github-actions]

Hello 👋, to help manage issues we automatically close stale issues.

This issue has been automatically marked as stale because it has not had activity for quite some time. Has this issue been fixed, or does it still require attention?

This issue will be closed in 15 days if no further activity occurs.

Thank you for your contributions.