title: CKeditor: missing "Upload" tab on image properties
body: <p>I am trying to use the <strong>CKEditor 3.6.2</strong> in a custom CMS. So far I have followed the instructions and downloaded the <a href="http://download.cksource.com/CKEditor/CKEditor/CKEditor%203.6.2/ckeditor_3.6.2.zip" rel="noreferrer">ZIP packaged</a>, extracted it and uploaded it in my root path. The problem is that everything works except for the "Upload" tab on the image properties. I tried changing the Upload: hidden true to false in the <em>image.js</em> file but still, nothing changed. This happens even on the CKEditor instances of the samples included. So I guess it's something I am missing. </p>
  
  <p>Anyone knows?! :) </p>