An incomplete 2FA login is one where the correct master password was provided,
but the 2FA token or action required to complete the login was not provided
within the configured time limit. This potentially indicates that the user's
master password has been compromised, but the login was blocked by 2FA.
Be aware that the 2FA step can usually still be completed after the email
notification has already been sent out, which could be confusing. Therefore,
the incomplete 2FA time limit should be long enough that this situation would
be unlikely. This feature can also be disabled entirely if desired.
When ticking the 'Also rotate my account's encryption key' box, the key
rotated ciphers are posted after the change of password.
During the password change the security stamp was reseted which made
the posted key's return an invalid auth. This reset is needed to prevent other clients from still being able to read/write.
This fixes this by adding a new database column which stores a stamp exception which includes the allowed route and the current security stamp before it gets reseted.
When the security stamp check fails it will check if there is a stamp exception and tries to match the route and security stamp.
Currently it only allows for one exception. But if needed we could expand it by using a Vec<UserStampException> and change the functions accordingly.
fixes#1240
