Backport to Quince: copy/paste unit from within a unit in Studio

[bradenmacdonald]

Description

This is a backport of #33724 to Quince.

Note: using this feature requires the contentstore.enable_copy_paste_units waffle flag. We intend to have this flag enabled by default in Quince.

Supporting information

Ticket: openedx/modular-learning#96

Testing instructions

1. Enable the contentstore.enable_copy_paste_units waffle flag.
2. See instructions on the earlier PR.

Deadline

Ideally before Quince release.

[openedx-webhooks]

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[open-craft-grove]

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[open-craft-grove]

Sandbox deployment failed.

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Please check the settings and requirements and retry deployment by updating the pull request or posting a /grove sandbox update comment.

[open-craft-grove]

Sandbox deployment failed.

Check failure logs here https://grove-stage-build-logs.nyc3.digitaloceanspaces.com/34602668-5707283950.log

Instance config : https://grove-stage-build-logs.nyc3.digitaloceanspaces.com/34602668-5707283950-config.yml
Instance requirements : https://grove-stage-build-logs.nyc3.digitaloceanspaces.com/34602668-5707283950-requirements.txt

Please check the settings and requirements and retry deployment by updating the pull request or posting a /grove sandbox update comment.

[arbrandes]

It works perfectly! Approved!

[openedx-webhooks]

@bradenmacdonald 🎉 Your pull request was merged! Please take a moment to answer a two question survey so we can improve your experience in the future.

[open-craft-grove]

Sandbox destroy request received.