title: WebBrowser blocks sliding in PivotControl
body: <p>I have PivotControl in my application and in some of pivotItems WebBrowser.
  I noticed that WebBrowser blocks sliding to next pivots. I'm not sure if this is ok, because
  other pivots slides and that one with WebBrowser doesn't, and that can be confusing. Is this 
  behavior correct? Is there way to solve this? (maybe little hack)</p>
  
  <p>here is my xaml code:</p>
  
  <pre><code>&lt;controls:Pivot Title="MY PIVOT"&gt;
      &lt;controls:PivotItem Header="first"&gt;
          &lt;TextBlock Text="First Pivot" /&gt;
      &lt;/controls:PivotItem&gt; 
      &lt;controls:PivotItem Header="second"&gt;
          &lt;TextBlock Text="Second Pivot" /&gt;
      &lt;/controls:PivotItem&gt;       
      &lt;controls:PivotItem Header="third"&gt;
          &lt;phone:WebBrowser Source="http://www.stackoverflow.com" /&gt;
      &lt;/controls:PivotItem&gt;
  &lt;/controls:Pivot&gt;
  </code></pre>