fix: enable scroll in grading modal

[viadanna]

Description

This pull request introduces scrollbars to the MFE to improve the user experience when dealing with large content areas.

Testing instructions

1. Deploy this to an instance.
2. Submit an ORA with many images and/or a large amount of text.
3. Go to the Instructor Dashboard > Open Assessment and start grading.
4. Ensure scrollbars show in the fullscreen modal window.

References

• fix: enable scroll in grading modal open-craft/frontend-app-ora-grading#5

[openedx-webhooks]

Thanks for the pull request, @viadanna!

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (25d76c0) to head (affd67b).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##            master      #356   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          109       109           
  Lines         1085      1085           
  Branches       165       166    +1     
=========================================
  Hits          1085      1085           

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[e0d]

@viadanna I'm going to add you to the triage group as you are covered by the OpenCraft CLA. Looks like this branch is stale and needs a rebase.

[viadanna]

@e0d Sure thing, done

[CodeWithEmad]

Thanks for the contribution, @viadanna. Can you kindly rebase your branch with the master?

[viadanna]

Thanks a lot @CodeWithEmad