title: TestStack White ui automation cannot find TabItem
body: <p>I am automating a wpf windows application. Trying to perform a logout function where I click on the settings icon. A new modal window opens up with several TabItems such as "General", "Security", "Appearance" etc.</p>
  
  <p>I would like to click on the security tabitem which has a textbox "Security". Upon clicking that, a pane adjacent to the TabControl loads with a signout button.</p>
  
  <p>I am unable to get the <strong>Security</strong> tabitem and unable to click on it. It does not have an AutomationId. So far I can get the TabControl which has all the TabItems within using this:</p>
  
  <pre><code>var tabControl = settingsWindow.Get(SearchCriteria.ByClassName("TabControl"));
  </code></pre>
  
  <p>But I am unable to select a TabItem and click on the buttons in the Security pane.</p>