Copy-the-code

[drien]

Since we've already generated a QRCode from the clipboard, why not have a button that allows copying the image itself to the clipboard for purposes other than scanning?

Per a review from ronnyvegas.

[drien]

The QR is currently being rendered as an SVG, however it seems that clipboard support for treating image/svg+xml as an actual image is not so great, so the only way to accomplish this would be to render the image as a different format. Presumably that leaves two options: use a different JS library that can render a QR as a PNG, or use something to convert the SVG to PNG. AFAIK there's nothing widely available preinstalled on Linux distros that we could shell out to.

[drien]

GNOME seems to include librsvg which provides... rsvg-convert, so that's the ideal path here.