title: Change WF4 ActivityDesigner theme
body: <p>I want to change my rehosted activities look to:</p>
  
  <p><img src="https://i.stack.imgur.com/J4FuA.png" alt="enter image description here"></p>
  
  <p>Already tried <a href="http://sdesmedt.wordpress.com/2008/10/18/exploring-workflow-foundation-part-x-custom-designers-the-activitydesigner-class/" rel="nofollow noreferrer"><code>ActivityDesignerTheme</code></a></p>
  
  <p>Need to do it without using <code>WorkflowViewElement</code> because I don't want to lose it's behaviors (breakpoint, expanding).</p>
  
  <p>If it's not possible, is there a way to change <code>ActivityDesigner</code> header background color?</p>