title: Set Spark button width in ButtonBar
body: <p>How do I set the individual button sizes in a Spark ButtonBar? It used to be something like:</p>
  
  <pre><code>&lt;mx:ButtonBar id="myButtonBar" buttonHeight="12" buttonWidth="250" &gt;
  </code></pre>
  
  <p>I get an error when I try to do the same in Spark:</p>
  
  <blockquote>
    <p>Cannot resolve attribute 'buttonHeight' for component type spark.components.ButtonBar</p>
  </blockquote>
  
  <p>I don't want to create a separate skin...just something that will work inline if possible</p>