Support widgets/links

[scriptex]

Patreon:

<a href="https://www.patreon.com/bePatron?u=20547077" data-patreon-widget-type="become-patron-button">Become a Patron!</a>
<script async src="https://c6.patreon.com/becomePatronButton.bundle.js"></script>

Ko-fi:

<script src='https://storage.ko-fi.com/cdn/scripts/overlay-widget.js'></script>
<script>
  kofiWidgetOverlay.draw('scriptex', {
    'type': 'floating-chat',
    'floating-chat.donateButton.text': 'Tip Me',
    'floating-chat.donateButton.background-color': '#f45d22',
    'floating-chat.donateButton.text-color': '#fff'
  });
</script>

Liberapay:

<script src="https://liberapay.com/scriptex/widgets/button.js"></script>
<noscript><a href="https://liberapay.com/scriptex/donate"><img alt="Donate using Liberapay" src="https://liberapay.com/assets/widgets/donate.svg"></a></noscript>

Issue hunt:
Use one of the images provided here and build own widget.

PayPal:
Research and implement own solution (a branded button which links to PayPal)

---

The UI should use this approach