Full screen mode for terminal preview

[hamvocke]

The Terminal preview gives you an idea what your color scheme will look like in a real terminal. I found that a root loops color scheme (especially a dark one) can look a little different when you see it in the windowed terminal preview on rootloops.sh vs when you actually use it in a full screen terminal on your computer. I think the issue is that the surrounding page is rather bright, messing a little with your perception - and when you then take root loops for a ride in a full screen terminal, it just looks a little different.

Allowing users to do a full screen preview of the color scheme could solve this perceptual problem.