title: Order on a second column
body: <p>I want to order my table by a second column.</p>
  
  <p>I know that there are attributes like <code>sortList</code>, <code>sortForce</code> and <code>append</code>.
  <code>sortList</code> and <code>sortForce</code> helped me to get my goal by a half.</p>
  
  <p>My goal: I want to order my entries like in the Windows file explorer.</p>
  
  <p>If you sort by a col ascending, all folders are display in order and than comes the files in order.</p>
  
  <p>If you sort by a col descending, all files are display in desc order and than comes the folders in descending.</p>
  
  <p>I have created a hidden column to solve this problem for the ascending ordering.
  This column get the type of the "entry" (file|dir). It got the <code>forceSort</code> attribute.</p>
  
  <p>But it is always order in the same direction. I want to change it to the order direction of the new clicked column.</p>
  
  <p>Long story short: no matter which column header was clicked, i want first order the hidden "type" column" and than the clicked column in the same direction, which the click column will have.</p>
  
  <p>Could anyone assist me here?</p>
  
  <p><a href="http://jsfiddle.net/JKjTp/3/" rel="nofollow noreferrer">FIDDLE</a></p>