Enable TOTP method when method is configured

[kasparsd]

What?

Users expect a method to be enabled if they chose to configure it.

Why?

Fixes #556.

How?

Testing Instructions

Setup workflow:

1. Configure the TOTP method by submitting the generated code.
2. Confirm the TOTP method is now enabled in the table.

Reset workflow:

1. Click on RESET TOTP method button.
2. Confirm the TOTP method is now disabled in the table.

Screenshots or screencast

totp-actions.mp4

Changelog Entry

Added - New feature.
Changed - Existing functionality.
Deprecated - Soon-to-be removed feature.
Removed - Feature.
Fixed - Bug fix.
Security - Vulnerability.