title: Setting focus on a ListBox item breaks keyboard navigation
body: <p>After selecting ListBox item programmatically it is needed to press down\up key <strong>two times</strong> to move the selection. Any suggestions?</p>
  
  <p>View:</p>
  
  <pre><code>&lt;ListBox Name="lbActions" Canvas.Left="10" Canvas.Top="10"
                 Width="260" Height="180"&gt;
          &lt;ListBoxItem Name="Open" IsSelected="true" Content="Open"&gt;&lt;/ListBoxItem&gt;
          &lt;ListBoxItem Name="Enter" Content="Enter"&gt;&lt;/ListBoxItem&gt;
          &lt;ListBoxItem Name="Print" Content="Print"&gt;&lt;/ListBoxItem&gt;
  &lt;/ListBox&gt;
  </code></pre>
  
  <p>Code:</p>
  
  <pre><code>public View()
  {
     lbActions.Focus();
     lbActions.SelectedIndex = 0; //not helps
     ((ListBoxItem) lbActions.SelectedItem).Focus(); //not helps either
  }
  </code></pre>