title: TValueListEditor with more columns
body: <p>I'm using a TValueListEditor and i would like to make an IDE property editor like.
  Each line can have few kinds of informations : </p>
  
  <ul>
  <li>String</li>
  <li>Date</li>
  <li>Number</li>
  <li>ComboList</li>
  </ul>
  
  <p>I'm wondering how can i store the type of element and the format for each line.</p>
  
  <p>I try to add 2 columns. But its not working </p>
  
  <pre><code>ValueListEditor.ColCount := 4;
  ValueListEditor.Cell[4,2] := 'Test';
  </code></pre>
  
  <p>It shows the value Test in the value column (the second column instead of 4).
  I was thinking to embeded the values that i need in an object that i will  link (add) to each line. But i didnt' find the way to do so. Even i don't know if it's possible.</p>
  
  <p>Does anyone have an idea ?</p>