* Fix broken security key 2FA on mobile login.hbs
* Show nicer error message when a security key already exists
* [COPY] Disable -> Delete for security key editing
* Standardize UI elements in 2FA prefs password confirmation
* Minor fixes to label location for resetPasswordProgress
Adds 2 factor authentication method via second factor security keys over [web authn](https://developer.mozilla.org/en-US/docs/Web/API/Web_Authentication_API).
Allows a user to authenticate a second factor on login, login-via-email, admin-login, and change password routes. Adds registration area within existing user second factor preferences to register multiple security keys. Supports both external (yubikey) and built-in (macOS/android fingerprint readers).
