title: Dynamically add "comment" during validation in Handsontable
body: <p>I can see that there are ways of creating comments in the cells array before rendering, and using the context menu. But is there a way to create a comment after a change?</p>
  
  <p>I originally tried this:</p>
  
  <pre><code>var errors = [];
  
  var hot = new Handsontable(container, {
      data: vendors,
      startRows: 1,
      afterChange: function(changes, source) {
          var row = changes[0][0];
          var col = changes[0][1];
          errors.push({
              row: row,
              col: col,
              comment: "Error"
          })
      comments: errors
  }
  </code></pre>
  
  <p>But it seems as though changing the <code>errors</code> object doesn't automatically render the comments. Is there a better way?</p>