title: How to move elements from a container to another one
body: <p>Hi everyone that my issu:</p>
  <p>I have some text in my editor : <code>&lt;p&gt; Test &lt;/p&gt;</code>. I put a comment on it (by using ckeditor comment feature) so it's in the model using markers.</p>
  <p>Thanks to a button from a custom plugin, I'm trying to put my selection into a container to apply a class on it  : <code>&lt;div class=&quot;selected&quot;&gt;&lt;p&gt;Test&lt;/p&gt;&lt;/div&gt;</code></p>
  <p>How can I do that without loosing the comment marker ?</p>