Use QRCode generator without minified source

[jowlo]

We are using qrcode-svg to generate QRCodes for our gift cards and for registering new TOTPs. qrcode-svg uses a lot of minified code 🤦‍♂️ that we also copied over.

The minified code is actually from qrcode-generator which is also on npm and provides SVG support natively (nowadays). As a bonus, it is not minified. For the qr codes on gift cards we need color support. I made a PR upstream.

A version containing the libs/qrcode.js after the PR is accepted is on qrcode-no-minified.