title: How to span column header over 2 columns with Kendo UI Grid Wrapper?
body: <p>Using the MVC Wrapper for Kendo Grid,
  How can I have the column header span 2 columns?</p>
  
  <p>I have 4 columns
  and want a header on the 1st and 3rd column
  spaning col1 and col 2, and the one on col 3 spaning col 3 an 4.</p>
  
  <p>when I do it with</p>
  
  <pre><code>.HeaderHtmlAttributes(new { Colspan = 2 })
  </code></pre>
  
  <p>it works, but there are always 4 headers, not only 2...</p>