feat: import dasboard changes for UI de-clutter

[Ian2012]

Description

This PR imports the changes for the dashboards for the UI de-clutter epic.

[openedx-webhooks]

Thanks for the pull request, @Ian2012!

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[bmtcril]

Issues I'm seeing when running this PR:

All dashboards:

• Video Engagement per Section/Subsection is always empty across all courses

Individual Learner:

• In the problems sub-tab instead of "Problem Attempts" and "Problem Results" charts, I get two "Problem Results" charts and they're both always empty

[bmtcril]

I am seeing some odd things locally, but we can merge this and see how it looks on a real sandbox as long as things are looking good before the next release.

[Ian2012]

I will fix all of that on the new environment