We need an icon for opening our QR code scanner in Kaidan. The view-barcode icon does not fit very well, because we are using explicitly QR codes.

Other XMPP/chat clients use this icon for opening the scanner:

(source: https://github.com/siacs/Conversations/blob/master/art/qrcode-scan.svg)

It would be great if someone could try to design a similar icon in breeze.