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