title: KendoChart: click on legend item - prevent default kendo behavior
body: <p>Default behavior of clicking on legend item hides/showes corresponding series on the chart. 
  How to prevent this?</p>
  
  <p>I try</p>
  
  <pre><code>$(...).kendoChart({
  ...
          legendItemClick: onLegendItemClick
  ...
  });
  </code></pre>
  
  <p>1)</p>
  
  <pre><code>function onLegendItemClick(e){
      //my code...
      e.preventDefault();
  }
  </code></pre>
  
  <p>2)</p>
  
  <pre><code>function onLegendItemClick(e){
      //my code...
      return false;
  }
  </code></pre>
  
  <p>both of it doesn`t help.</p>