feat: [FC-0070] handled edit modals from advanced xblocks

[PKulkoRaccoonGang]

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[openedx-webhooks]

Thanks for the pull request, @PKulkoRaccoonGang!

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[bradenmacdonald]

This has a typo - see openedx/frontend-app-learning#1500

Also, the same code in frontend-app-learning has this important notice which seems like it should be here too:

https://github.com/openedx/frontend-app-learning/blob/0effb3231831ef54eb5951d3bfa85d4975989605/src/courseware/course/sequence/Unit/ContentIFrame.jsx#L12-L23