Wasm inline style clashes with CSP headers

[timvw01]

When compiling to WASM and having CSP headers the file dialog doesn't work because it has inline CSS. A nice feature would be to opt out of the style. In that case users can just copy paste the CSS to their own file and avoid CSP errors. If agreed, i can make a PR.

[PolyMeilex]

Sure, but let's make it a runtime feature, the amount of compile time flags is getting annoying 😅