PNG and JPEG exports at low quality

[NoahMaizels]

In which part of the interface would this feature applies?

[ ] 1. Load your data
[ ] 2. Choose a chart
[ ] 3. Mapping
[ ] 4. Customize
[x] 5. Export

Is your feature request related to a problem? Please describe.
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Right now to get a decent quality image I need to download it as an SVG and then export from the SVG to .png or .jpg myself in GIMP or Inkscape. If I try to export directly to .jpg or .png from the rawgraph app, it's very low quality and pixelated.

Describe the solution you'd like
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I would like there to be an option to set export quality.

Describe alternatives you've considered
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Continue doing it as I do now.

Additional context
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