Show passing (all) testcases when the user submits a correct schema

[erosb]

Requested by Sandrina Pereira on slack:

The "cases" is super useful as examples, but when the solution is valid it disappears. I find it useful when it's always visible

[pavanydg]

I would like to work on this.

[JeelRajodiya]

Hello @pavanydg, Thank you for showing interest, however I am planning to work on this issue by myself.
We are planning to add some gamified effects (i.e. confetti) (ref:#78) So this issues might have some design clashes.

[techmannih]

@JeelRajodiya May I work on this issue

[JeelRajodiya]

This issue is open for contributors! interested contributors please comment.

[techmannih]

@JeelRajodiya I am interested, May I work on this issue please assign me.

[JeelRajodiya]

Great!!