title: How to left align the OutlineButton icon in Flutter
body: <p>How to left align the <code>OutlineButton</code> icon in Flutter?
  <code>Icon</code> can be added as follows, but both icon and text are centered aligned in the button. Is there a way to align the icon to the left and text to the center?</p>
  <pre><code>return new OutlineButton.icon(
    onPressed: onPressed,
    label: new Text(title),
    icon: icon,
    highlightedBorderColor: Colors.orange,
    color: Colors.green,
    borderSide: new BorderSide(color: Colors.green),
    shape: new RoundedRectangleBorder(
        borderRadius: new BorderRadius.circular(5.0)));
  </code></pre>