Added logic to render a checkbox for each item, to be intended to be …

…used to specify which item to edit or remove.

webpack_in/entry.jsx

@@ -76,7 +76,7 @@ class TextWidget extends React.Component {

class ListItem extends React.Component {
    render() {
        return (<li>{ this.props.caption }</li>);
        return (<li><input type='checkbox' />{ this.props.caption }</li>);
      }
}