title: KeyIcon doesn't work
body: <p>I'm using the following code (this is a part of it) for my softKeyboard. </p>
  
  <pre><code>&lt;Row android:rowEdgeFlags="bottom" &gt;
      &lt;Key
          android:codes="83"
          android:keyLabel="CLR" /&gt;
      &lt;Key
          android:codes="39"
          android:keyLabel="0" /&gt;
      &lt;Key
          android:codes="42"
          style="@style/deleteKeyboard"
          android:keyIcon="@drawable/button_delete"
          android:isRepeatable="true"
          android:keyLabel="DEL" /&gt;
  &lt;/Row&gt;
  </code></pre>
  
  <p>For some reason <strong>style</strong> or <strong>keyIcon</strong> won't work. Not matter what, I can't set only one button on keyboard to different layout. What am I doing wrong? I tried just with style and keyIcon, but no combination worked so far. </p>
  
  <pre><code>&lt;style name="deleteKeyboard"&gt;
      &lt;item name="android:keyTextColor"&gt;#EEEEEE&lt;/item&gt;
      &lt;item name="android:keyBackground"&gt;@drawable/button_delete&lt;/item&gt;
      &lt;item name="android:keyTextSize"&gt;15sp&lt;/item&gt;
  &lt;/style&gt;
  </code></pre>