[UI idea] Improve navigation of teacher's manual

[MarleenGilsing]

As much as I love the long long list of possible mistakes I've created, maybe we could give this page a bit more structure with foldable levels. This way you wouldn't see all the levels at once.

[Shubh8899]

I would like to contribute to this one.

[Felienne]

I think this is not just true for the mistakes, but for the whole menu. I think we just used our own code for the folding, but I am sure there is some library we could use for that to solve the problem?

[Felienne]

Probably something to pick up with @gisellandrade?

[gisellandrade]

yes, i'll make a proposal for this page to redesign

Probably something to pick up with @gisellandrade?

[gisellandrade]

What do you think about this improvement?