fix: Copy to clipboard would seemingly fail even if it worked [FC-0083]

[bradenmacdonald]

Description

When working on clipboard enhancements for containers, I noticed bugs with almost all of the "Copy to clipboard" actions in the MFE. They would work, but report an error that they failed, because the broadcast channel was closed.

Before:

After:

Testing instructions

Open library content and/or courses in the Authoring MFE. Try copying XBlocks or Units.

Make sure the sync among tabs is still working.

Other information

Private ref: Part of FAL-4067

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.56%. Comparing base (a522c48) to head (0e0db12).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1800   +/-   ##
=======================================
  Coverage   93.56%   93.56%           
=======================================
  Files        1136     1136           
  Lines       23241    23245    +4     
  Branches     5008     4913   -95     
=======================================
+ Hits        21745    21749    +4     
  Misses       1428     1428           
  Partials       68       68           

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[rpenido]

LGTM 👍
Thank you for your work, @bradenmacdonald!

• I tested this using the instructions from the PR
• I read through the code
• I checked for accessibility issues
• Includes documentation

[bradenmacdonald]

Thanks! @ChrisChV could you please review as CC?

[ChrisChV]

@bradenmacdonald Looks good, could you fix the conflicts?