title: What happened to windowContentOverlay in Android API 18?
body: <p>After upgrading my phone to Android 4.3 I noticed the shadow below the actionbar is not showing anymore. In my app I've got a custom shadow using <code>windowContentOverlay</code>:</p>
  
  <pre><code>&lt;item name="android:windowContentOverlay"&gt;@drawable/shadows_bottom&lt;/item&gt;
  </code></pre>
  
  <p>It's always been showing but now it's gone on API 18.
  Removing that line from the theme doesn't change anything. while on other API versions it shows a default slight shadow.</p>
  
  <p>Anyone else has noticed that issue?</p>