More flexible embeds

[looeee]

@cwervo

I’d love to be able to (as described above) do https://glitch.com/edit/#!/caff?path=public/other-page.html?appPreview=public/other-page.html in order to embed a new example without making a whole new Glitch project.

This is exactly what I need as well. Has there been any progress on this in the past year?