Give explicit names to MobX observer components (#1413)

* Consider observer(...) as components

* Add display names to MobX observers

* Temporarily suppress nested components

* Suppress new false positives for react/prop-types

src/App.native.tsx

@@ -19,7 +19,7 @@ import {handleLink} from './Navigation'
 
 SplashScreen.preventAutoHideAsync()
 
-const App = observer(() => {
+const App = observer(function AppImpl() {
   const [rootStore, setRootStore] = useState<RootStoreModel | undefined>(
     undefined,
   )