fix: do open editor of new xblock when duplicating

[DanielVZ96]

Description

Fixes bug where after duplicating an xblock, the editor modal of the old xblock is being open instead of the new copied xblock.

Supporting information

• Comment that reported this issue
• Reported again here: Duplicating a component opens an editor for original rather than the copy #1919

Testing instructions

• Use this branch of edx-platform
• On an unit page duplicate an xblock
• Assert that:

1. Only the MFE modal is open
2. The MFE modal is pointing to the new xblock.

Other information

Private-ref

[openedx-webhooks]

Thanks for the pull request, @DanielVZ96!

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[codecov]

Codecov Report

Attention: Patch coverage is 98.07692% with 1 line in your changes missing coverage. Please review.

Project coverage is 93.80%. Comparing base (65aca04) to head (f16834b).
Report is 37 commits behind head on master.

Files with missing lines	Patch %	Lines
src/course-unit/xblock-container-iframe/index.tsx	90.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1887      +/-   ##
==========================================
+ Coverage   93.77%   93.80%   +0.02%     
==========================================
  Files        1146     1154       +8     
  Lines       23898    24106     +208     
  Branches     5042     5104      +62     
==========================================
+ Hits        22411    22612     +201     
- Misses       1419     1426       +7     
  Partials       68       68              

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[DanielVZ96]

moving this to draft as we may need some changes to support video gallery based on openedx/edx-platform#36641 (comment)

[pomegranited]

@DanielVZ96 It's ok to fix just the block duplication issues here, and use a separate PR for the video gallery fixes.
I'm seeing some weird stuff when I try to duplicate even a Text block -- when editing the new block, and after saving changes, it's like the whole Authoring MFE is iframed inside itself.

Duplicate.block.iframe.in.iframe.mp4

[pomegranited]

👍 This is working! Thank you @DanielVZ96 .

• I tested this on my tutor dev stack with fix: open mfe modal editor of new duplicated xblock edx-platform#36641
  • duplicated blocks in a course -- opens a modal to edit the duplicated block.
  • with new_core_editors.use_video_gallery_flow flag enabled, created a video block, and ensured the video gallery is shown. I couldn't test the full edx-val pipeline on my local dev stack, though.
  • with new_core_editors.use_video_gallery_flow flag disabled, created a video block, and ensured the normal video editing modal is shown.
• I read through the code
• I checked for accessibility issues by using my keyboard to navigate
• Includes documentation N/A
• User-facing strings are extracted for translation N/A

[ChrisChV]

Looks good! I added some comments