Preview Zoom

[foxt]

Is your feature request related to a problem? Please describe.
Currently, the preview renders at 1x scale. This, while fine for higher resolution assets on larger screens, trying to pick out 7 pixels on a high res, 1440p or 14" display leads to a lot of squinting

Describe the solution you'd like
Zoom level for the preview, even if integer scaling only and with unantialiased-nearest-neighbour scaling.

Additional context