Improve journey when scanning QR code from bridges.torproject.org
As of 6.17, the QR code scanning is offered as part of "Ask for a Tor bridge by email".
rdsys displays a QR code in the web results as well:
If someone has Tor Browser running on their phone already, they might prefer scanning a QR code from https://bridges.torproject.org/ than sending an email. We could make this clearer.
This would require restructuring the screen and might make the email journey less clear.
Depending on when we'll get #15331, it might be worth working on this issue before #15331 or not.