title: Add control in NavBarGroup of DevExpress NavBarControl
body: <p>Is it possible to add custom control(s) to the group header of a navbarcontrol in devexpress 11.2 ?</p>
  
  <p>I want a control that folds and can accept a custom control in it. That's why I chose NavBar Control. Now, I want to add a button (or anything in general) to the group bar of it.</p>
  
  <p>The control I want to add whould be like <code>Show/Hide Favorites</code>.</p>
  
  <p><img src="https://i.stack.imgur.com/P7k7m.png" alt="Example on where the control should be added"></p>