Update the curriculum dashboard to be easier to navigate

[misakimichy]

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Description

• Updated 'Go to submodule >' text with a play button.
• Updated the text in the header.
• Updated a unit test.

Resolves Issue: closes #278.

[scottjr632]

Its looks good so far! Do you think you could also make the descriptions of the submodules be open by default as well?

[misakimichy]

Oh, all of the descriptions?

[scottjr632]

Oh, all of the descriptions?

Yes 😄 If that's ok? We can always move that to another ticket. But it should be as easy as changing the default value in SubModule.tsx to true on line 52.

[misakimichy]

I’ll update the part! No need to create a new ticket, Scott :)

[misakimichy]

@scottjr632 I made an update for the descriptions of the submodules be open by default and added some stylings for the description. Please review!