cleanup: silence our own React dev-console warnings

UNSAFE_ rename of our 4 componentWillReceiveProps (FireStats, Fires, FromNow,
SelectionMap) and Authenticated/Public component propType func -> elementType.
Rest of the console noise is legacy react-* dev-mode warnings, absent in prod.

imports/ui/components/Authenticated/Authenticated.js

@@ -17,7 +17,9 @@ const Authenticated = ({ loggingIn, authenticated, component, path, exact, ...re
 Authenticated.propTypes = {
   loggingIn: PropTypes.bool.isRequired,
   authenticated: PropTypes.bool.isRequired,
-  component: PropTypes.func.isRequired,
+  // elementType (not func): route components may be HOC-wrapped (translate(),
+  // memo, forwardRef), which are objects, not plain functions.
+  component: PropTypes.elementType.isRequired,
 };
 
 export default Authenticated;