feat: fixed delete button

[vladislavkeblysh]

Fixed delete for additional video url fields

Moved from openedx/frontend-lib-content-components#418

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[codecov]

Codecov Report

Attention: Patch coverage is 80.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 92.22%. Comparing base (bbe15af) to head (3774e1c).
Report is 17 commits behind head on master.

Files with missing lines	Patch %	Lines
...ttingsModal/components/VideoSourceWidget/index.jsx	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1266   +/-   ##
=======================================
  Coverage   92.22%   92.22%           
=======================================
  Files        1008     1008           
  Lines       18513    18515    +2     
  Branches     3956     3905   -51     
=======================================
+ Hits        17073    17075    +2     
- Misses       1371     1373    +2     
+ Partials       69       67    -2     

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[KristinAoki]

@vladislavkeblysh PR #1241 resolved the fallback video delete issue. I am closing this PR. Feel free to reopen if the bug is not resolved or you believe your fix has better performance.