fix: show correct aggregate report to students option value after save in Studio

[ihor-romaniuk]

Description

This pull request contains minor style refactoring and fix to display a correct value in the Studio for the aggregate report to students option after change.

Steps to Reproduce:

1. Open unit -> add new component -> Advanced -> choose Provide feedback
2. Click on Edit
3. Set True for Show aggregate report to students
   
4. Click on Edit again

Actual Result:

Option displayed as False, but in fact it's enabled

Expected Result:

Option displayed as True if it's enabled

[openedx-webhooks]

Thanks for the pull request, @ihor-romaniuk!

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.47%. Comparing base (ab0bd00) to head (292a193).
Report is 61 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #85   +/-   ##
=======================================
  Coverage   92.47%   92.47%           
=======================================
  Files           5        5           
  Lines         226      226           
=======================================
  Hits          209      209           
  Misses         17       17           

Flag	Coverage Δ
unittests	92.47% <ø> (ø)

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[mphilbrick211]

@openedx/axim-engineering - can you help with this?