fix: Rename optimistic update in children containers

[ChrisChV]

Description

• When you update the title of a unit/subsection in the subsection/section page, the text returns to the previous value for a while. This PR fix that issue
• Which edX user roles will this change impact? "Course Author.

Supporting information

• This issue was encountered while working on Rename section/subsection from full-page view openedx/frontend-app-authoring#1971
• Internal ticket: FAL-4165

Testing instructions

• Go to the library home of a library
• Create one unit, one subsection and one section.
• Add the unit to the subsection.
• Add the subsection to the section.
• On the section page, rename the subsection, verify that the optimistic update works.
• On the subsection page, rename the unit, verify that the optimistic update works.

Other information

• Fixing this issue results in an increase in requests, but the user is not affected for the use of placeHolderText

[pomegranited]

👍 couple of lint issues but this is working well. I like the optimistic update behaviour, and would like to see it used everywhere.

I think we need a test or two though?

• I tested this on my devstack with and without a running CMS, to make sure that the optimistic update reverts if it cannot be saved.
• I read through the code
• I checked for accessibility issues by using my keyboard to navigate
• Includes documentation
• User-facing strings are extracted for translation

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (chris/FAL-4165-fix-name-in-unit-sidebar@0e0c9ef). Learn more about missing BASE report.

Additional details and impacted files

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##             chris/FAL-4165-fix-name-in-unit-sidebar      #90   +/-   ##
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[ChrisChV]

Hi @bradenmacdonald, are you ok with these changes? I am planning to merge it with openedx#2100 and then merge that PR

Edit: I got confused, it's better to merge them separately because this one can't be backported to Teak

[bradenmacdonald]

@ChrisChV Since this was targettng a branch on the open-craft fork, it doesn't need a CC review. I think you'll need to open a new PR if you want to merge it separately, and then I can review if you need.

[ChrisChV]

Closed in flavor of openedx#2141