message: Moved nav bar to top
  It matches online examples
diff: @@ -51,6 +51,7 @@ export default class Grid extends React.Component {
  const {colors} = this.props;
  return (
  <>
  + <NavigationBar title="Colors" />
  <ScrollView
  style={styles.scene}
  nestedScrollEnabled={true}
  @@ -66,7 +67,6 @@ export default class Grid extends React.Component {
  ))}
  </View>
  </ScrollView>
  - <NavigationBar title="Colors" />
  </>
  );
  }
  