Today we released an update that enables support for SVG graphs to be returned rather than PNG.
To enable this support you can do so from Settings → Webui Settings → Graph Settings:
If you have issues where graphs look smaller please just restart php-fpm or your web server. We are also aware that the legend font is currently not as legible as it could be and another pull request has been submitted to resolve this.
No doubt some small issues will arise, please let us know if that is the case.