minor tweak for school.

[ELI7VH]

Hey, just been following the a-frame school (thanks btw, it's very nice)

The side margin is a bit cutoff when looking on half-screen. I could make a PR this weekend to fix, but somebody who knows the framework and is familiar with it already could probably do it in 5 seconds :)

[lainshiHenry]

Page: https://aframe.io/aframe-school/#/8

No margin issues found as of the time of this finding.
This may have already been fixed after this issue was posted.

@dmarcos Can you please confirm and close this?

[dmarcos]

I think still an issue. Can shrink the window horizontally to reproduce. Thanks