Explain consequences when adding second Multi-Factor Auth
Summary:
Warn users who already have MFA set up that adding a second Multi-Factor Auth will require entering both instead of being able to choose from one of them.
This is currently not clear. I was surprised by this, now I have another user also surprised.
Closes T16081
Test Plan:
1. As an admin, set up TOTP as an auth provider at http://phorge.localhost/auth/mfa/
2. As a user, add a first TOTP auth factor at http://phorge.localhost/settings/panel/multifactor/
3. As a user, try to add a second TOTP auth factor and see an additional sentence in the dialog
Reviewers: O1 Blessed Committers, valerio.bozzolan
Reviewed By: O1 Blessed Committers, valerio.bozzolan
Subscribers: mainframe98, tobiaswiese, valerio.bozzolan, Matthew, Cigaryno
Maniphest Tasks: T16081
Differential Revision: https://we.phorge.it/D26028