added details to dev-grid-utils.js

[aristo-13]

Proposed changes

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• [ ] Bugfix (non-breaking change which fixes an issue)
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Checklist

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• [ ] I have tested desktop and mobile views
• [ ] Lint (yarn lint) and unit tests (yarn test) pass locally with my changes
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] I have added necessary documentation (if appropriate)

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