title: GridViewColumnHeader confusion
body: <p>Why would that work:</p>
  
  <pre><code>&lt;Style x:Key="myHeaderStyle" TargetType="{x:Type GridViewColumnHeader}"&gt;
    &lt;Setter Property="Background" Value="LightBlue"/&gt;
  &lt;/Style&gt;
  </code></pre>
  
  <p>And not this?</p>
  
  <pre><code>&lt;ListView.View&gt;
       &lt;GridView&gt;
           &lt;GridView.ColumnHeaderContainerStyle&gt;
               &lt;Style&gt;
                  &lt;Setter Property="Background" Value="Orange" /&gt;
               &lt;/Style&gt;
           &lt;/GridView.ColumnHeaderContainerStyle&gt;
  ...
  </code></pre>
  
  <p>thanks</p>