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What does this PR do?
Adds a simple class component that wraps the entire app with an error boundary. In case of an uncaught error the web app crashes and renders a white screen. Now, it will instead display the error message for 10 seconds, then proceed to restart the app.
Checklist before merging
cd frontend; npm run format
. If it's a mobile app feature I rancd mobile; npm run format
.cd frontend/static/locales; python collect_phrases.py
to collect them for translation.