[Accessibility] Errors are announced as the appear in the manifest editor #4336
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fixes #4234
PR Type
Bugfix
Describe the current behavior?
If an error had appeared in the manifest editor, the screen reader wouldn't know
Describe the new behavior?
Added aria live = polite to the error messages so they are announced if they appear after updating an input
PR Checklist
npm run test
and ensure that all tests passAdditional Information