Create QR Code for existing keys in app

[KaranKad]

Add option to generate QR Code for existing keys within the app. It's convenient for sharing with other devices.

[2fas-com]

Thanks for your suggestion, we really appreciate every input! We plan to implement a code-sharing option, but there is no ETA on that.

[sunlight708]

Facebook authentication backup coad

[skeezmoe]

Upvoting this request. This option would also be useful in the cases where someone needs to migrate to a different TOTP Auth provider.

Havng an export in plain text or json is not useful since the new Auth providers would need to somehow "know" how to parse the file whereas scanning a QR code is always a requirement for any auth provider app.