Move helpText to LicenseDropdown component

[LianaHarris360]

Summary

Description of the change(s) you made

This pull request addresses the issue of the overlapping "About Licenses" dropdown button with the text Cannot edit for public channel resources by moving the helpText to the LicenseDropdown component as a new parameter.

Screenshots (if applicable)

Before	After

---

Reviewer guidance

How can a reviewer test these changes?

1. Open a channel and import a resource from another channel
2. Open the Edit source modal for that resource

References

Fixes #4736

---

Contributor's Checklist

PR process:

• If this is an important user-facing change, PR or related issue the CHANGELOG label been added to this PR. Note: items with this label will be added to the CHANGELOG at a later time
• If this includes an internal dependency change, a link to the diff is provided
• The docs label has been added if this introduces a change that needs to be updated in the user docs?
• If any Python requirements have changed, the updated requirements.txt files also included in this PR
• Opportunities for using Google Analytics here are noted
• Migrations are safe for a large db

Studio-specifc:

• All user-facing strings are translated properly
• The notranslate class been added to elements that shouldn't be translated by Google Chrome's automatic translation feature (e.g. icons, user-generated text)
• All UI components are LTR and RTL compliant
• Views are organized into pages, components, and layouts directories as described in the docs
• Users' storage used is recalculated properly on any changes to main tree files
• If there new ways this uses user data that needs to be factored into our Privacy Policy, it has been noted.

Testing:

• Code is clean and well-commented
• Contributor has fully tested the PR manually
• If there are any front-end changes, before/after screenshots are included
• Critical user journeys are covered by Gherkin stories
• Any new interactions have been added to the QA Sheet
• Critical and brittle code paths are covered by unit tests

---

Reviewer's Checklist

This section is for reviewers to fill out.

• Automated test coverage is satisfactory
• PR is fully functional
• PR has been tested for accessibility regressions
• External dependency files were updated if necessary (yarn and pip)
• Documentation is updated
• Contributor is in AUTHORS.md

[nucleogenesis]

Changes LGTM - just one request to add a comment for the hardcoded px value

[nucleogenesis]

Could you put a comment explaining why this is hardcoded like this? It LGTM but since it is a particular case it can be helpful to leave a note about what this is doing on the page.

[LianaHarris360]

That's a good point, I'll add that in.

[nucleogenesis]

@LianaHarris360 I tested and tried a couple times to be sure that when I have nodes I've copied from a published & public channel and paste them into a new channel, I don't see the text beneath the inputs for the 4 disabled inputs.

I confirmed the channel I copied from to be public by going to the Administration page and seeing it had the green dot.

Am I maybe not testing out the correct situation?

[LianaHarris360]

Hmm, I think maybe you're on the edit details page, the help text does not show on there. But now I'm wondering why the help text displays within the edit source modal but not when trying to edit the source from the edit details page.

editSource.mov