Improve react examples

src/dynamicComponentExample/ChildMessageRenderer.jsx

@@ -13,7 +13,7 @@ export default class ChildMessageRenderer extends Component {
 
     render() {
         return (
-            <span><button style={{height: 20}} onClick={this.invokeParentMethod}>Invoke Parent</button></span>
+            <span><button style={{height: 20, lineHeight: 0.5}} onClick={this.invokeParentMethod} className="btn btn-info">Invoke Parent</button></span>
         );
     }
 };