master missing team update fixes from 299

[lynxlynxlynx]

#299 got merged into the then preview branch: https://github.com/letsdoitworld/World-Cleanup-Day/commits/react-native-app-prototype

It's missing from the final code that was pushed to the main react branch and subsequently master. This is causing merge conflicts to show also for #318. What happened? It doesn't appear this fresh code is obsolete.

(the same was true for the mobile README update, but I already cherry-picked that over)