Added new button with caption 'Change text...' intended to be wired-u…

…p to change the text content in the <TextWidget>.

webpack_in/entry.jsx

@@ -32,7 +32,8 @@ class TextWidget extends React.Component {
     render() {
         return (
             <div style={ objStyleCommon }>
-              Some text here....
+              <div>Some text here....</div>
+              <button>Change text...</button>
             </div>
           );
       }