title: ZK Framework Listbox Sorting not working with Dynamic Header?
body: <p>Hi i am showing Listbox header dynamically like this...</p>
  
  <pre><code>&lt;listhead children="@load(vm.headerList)"&gt;
                  &lt;template name="children" var="headerName"&gt;
                      &lt;listheader label="@load(headerName)"  &gt;&lt;/listheader&gt;
                  &lt;/template&gt;
              &lt;/listhead&gt;
  </code></pre>
  
  <p>but when i am trying to add </p>
  
  <pre><code>sort="auto"
  </code></pre>
  
  <p>attribute in the listheader it is throwing exception .</p>
  
  <p>Any one know how can i add sorting for dynamic headers?</p>
  
  <p>Thanks</p>