title: hoverColor property of the Raised button class in Flutter, doesn't change?
body: <p>Edit: I am using the IOS simulator, the following issue may not be persistent across all platforms.</p>
  
  <p>I am under the impression that when creating a RaisedButton, it is possible to change the color of the button when the cursor hovers over the button.</p>
  
  <p>However this does not appear to be the case.</p>
  
  <p>// Create button</p>
  
  <pre><code>RaisedButton(
      onPressed: () {},
      color: Colors.redButtonBackgroundColo
      textColor: Colors.white,
      disabledColor: Colors.disabledRedButtonBackgroundColor,
      disabledTextColor: Colors.white,
      disabledElevation: 4,
      elevation: 4,
      hoverColor: Colors.redHoveredOverButtonColor, //&lt;--- Here is where I would like to change the button color (to a slightly lighter shade.)
      padding: const EdgeInsets.all(14.0),      
   ),        
  </code></pre>
  
  <p>Thanks in advance for any help you may provide.</p>