Add QR and scan to copy

[tolltalcrypto]

https://discord.com/channels/554694662431178782/1359246142138749068

Hpayne expressed some details to make QoL better on Classic.

hpayne - "is there a way to scan a QR code with someones pub key to populate these address bars? Or have something with prepopulated address bars? Current flow is a bit difficult to use on the go I have learned"

FBL"we have the component to add a lil QR icon and scan to copy so it'd probably be just that."