Option to scan license key as QR code

[wynntee]

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Summary

Add the option to scan license key as QR code

Motivation

If a user purchases the license key using a desktop, they have to find a way to send the very long license key to their Android device. The current options are:

1. Open the license email on the Android device and click the link therein.
2. Share the key string with the Android device somehow, and copy-paste the string into the input field.

I propose a 3rd option where the license key is displayed as a QR code on the desktop (where the purchase was made), and the user is given the option to scan the QR code when asked for the license key.

Considered Alternatives

No response

Anything else?

No response