title: Item with app:showAsAction not showing
body: <p>I can't understand why wrong and incompatible (AndroidStudio tells me "Should use app:showAsAction with the appcompat library) code</p>
  
  <pre><code>&lt;menu xmlns:android="http://schemas.android.com/apk/res/android" &gt;
      &lt;item android:id="@+id/action_search"
        android:title="@string/action_search"
        android:icon="@drawable/search"
        android:showAsAction="always" /&gt;
  &lt;/menu&gt;
  </code></pre>
  
  <p>works perfect, but proper and compatible version like</p>
  
  <pre><code>&lt;menu xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto" &gt;
      &lt;item android:id="@+id/action_search"
            android:title="@string/action_search"
            android:icon="@drawable/search"
            app:showAsAction="always" /&gt;
  &lt;/menu&gt;
  </code></pre>
  
  <p>not showing my icon at all.</p>
  
  <p>I'm testing on Samsung GT P5210 (android v. 4.4.2) and Nexus 7 (4.4.4)</p>