title: Scala swing 2.8 how do I set the background color of a Slider?
body: <p>How can I set the background color of a Slider in Scala Swing 2.8 final.
  I copied the UIDemo object provided in the distribution for my tests and added</p>
  
  <pre><code>background = java.awt.Color.RED
  </code></pre>
  
  <p>but that does not take effect on my mac.</p>
  
  <pre><code>object UIDemo extends SimpleSwingApplication {
  ...
  object slider extends Slider {
    min = 0
    value = tabs.selection.index
    max = tabs.pages.size-1
    majorTickSpacing = 1
    background = java.awt.Color.RED
  }
  ...    
  }
  </code></pre>
  
  <p>I had in mind that this was working before - did I miss something along the way?</p>
  
  <p>Thanks,
  Paul</p>