feat: added the ability to close the hint using the keyboard

[vladislavkeblysh]

Close the tooltip using the escape

[openedx-webhooks]

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[codecov]

Codecov Report

Attention: Patch coverage is 33.33333% with 4 lines in your changes missing coverage. Please review.

Project coverage is 84.55%. Comparing base (3cbbb02) to head (e42a23a).

Files with missing lines	Patch %	Lines
...ss-tab/grades/grade-summary/GradeSummaryHeader.jsx	33.33%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1605      +/-   ##
==========================================
- Coverage   84.61%   84.55%   -0.06%     
==========================================
  Files         332      332              
  Lines        5661     5667       +6     
  Branches     1391     1392       +1     
==========================================
+ Hits         4790     4792       +2     
- Misses        852      856       +4     
  Partials       19       19              

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[itsjeyd]

@vladislavkeblysh Thank you for this contribution!

Same note about product review here.

[itsjeyd]

Hey @vladislavkeblysh, just checking in to see if you're still planning to continue working on this PR?