feat: Removed default value for isOverflowVisible in ModalDialog

[PKulkoRaccoonGang]

Description

Removed default value for isOverflowVisible in ModalDialog component and added usage example.

Issue: #3116

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[openedx-webhooks]

Thanks for the pull request, @PKulkoRaccoonGang!

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.76%. Comparing base (b4d560b) to head (7cfbd7b).
Report is 1 commits behind head on Peter_Kulko/style-dictionary-v4.

Additional details and impacted files

@@                       Coverage Diff                        @@
##           Peter_Kulko/style-dictionary-v4    #3279   +/-   ##
================================================================
  Coverage                            93.76%   93.76%           
================================================================
  Files                                  229      229           
  Lines                                 3784     3784           
  Branches                               906      906           
================================================================
  Hits                                  3548     3548           
  Misses                                 232      232           
  Partials                                 4        4           

☔ View full report in Codecov by Sentry.
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[brian-smith-tcril]

Beautiful! Thank you so much for this!