Don't downscale images if they fit in the webpage

[VulumeCode]

The result image has "object-fit: contain;" and the panel it's in is quite small. There's plenty of room to show a typical 512x512 image, but they're all scaled to like 400x400 (at least on my 1080p screen).

It's just what they look like in the web UI, they're saved in full resolution on disk and you can right-click save as or open in new tab, but it's a bit sad to lose detail in the web view.