title: how to override default action bar with custom layout actionbar
body: <p>I try to get rid of default action bar by load a custom action bar. But then, it become like this :</p>
  
  <p><img src="https://i.stack.imgur.com/21siW.jpg" alt="enter image description here"></p>
  
  <p>FYI : this project is including navigation drawer sidebar. I am not really sure if the <code>gray block</code> thingy come from navigation drawer.</p>