Group description edit

[corrad82-4s]

References

Add references/links to any related issues or PRs. These may include:

• Fixes Cannot edit group description from the UI #1963

Description

Short summary of changes (1-2 sentences).
Replaced replace operation with add in group-form component and added tests on edit of group description.

Instructions for Reviewers

List of changes in this PR:

• Replaced replace operation with add in group-form component

Include guidance for how to test or review your PR. This may include: steps to reproduce a bug, screenshots or description of a new feature, or reasons behind specific changes.

• Login as admin
• Navigate to the edit of a non permanent group
• Edit the description & save, or add a new description if missing

Checklist

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• My PR is small in size (e.g. less than 1,000 lines of code, not including comments & specs/tests), or I have provided reasons as to why that's not possible.
• My PR passes ESLint validation using yarn lint
• My PR doesn't introduce circular dependencies (verified via yarn check-circ-deps)
• My PR includes TypeDoc comments for all new (or modified) public methods and classes. It also includes TypeDoc for large or complex private methods.
• My PR passes all specs/tests and includes new/updated specs or tests based on the Code Testing Guide.
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• If my PR includes new features or configurations, I've provided basic technical documentation in the PR itself.
• If my PR fixes an issue ticket, I've linked them together.

[tdonohue]

👍 Thanks @corrad82-4s ! Tested this today and it fixes the bug. Code looks good too.