title: Unable to change "Reason" when adjusting state on work item type (TFS2013)
body: <p>I'll start with I'm new to customizing TFS and my TFS team project is a 99% vanilla template of <code>Microsoft Visual Studio Scrum 2013</code>.  So I think my issue might be obvious to someone.  I'm also using VS PowerTools.</p>
  
  <p>In a Scrum Task, when you change the status from <strong>To Do</strong> to <strong>Done</strong>, it defaults the Reason to "<strong>Work finished</strong>".  I'd like to be able to select alternative reasons, so I went to the transition from <code>To Do-&gt;Done</code> and added a new reason called "<strong>Obsolete</strong>", then saved it back to the server.  I've verified it shows up in the XML, etc.</p>
  
  <p><img src="https://i.stack.imgur.com/tc475.png" alt="Work Item Type Workflow Screenshot"></p>
  
  <p>When I change from <strong>To Do->Done</strong>, the reason is still greyed out and defaults to "Work finished"?</p>
  
  <p><img src="https://i.stack.imgur.com/iuROE.png" alt="Scrum WIT"></p>
  
  <p>I created a new team project with the Agile 2013 template, and when you change the status from <strong>New->Closed</strong> you get the option to change the Reason to "Completed/Obsolete/Deferred/Cut".  This is the basic functionality I was trying to mimic.</p>
  
  <p><img src="https://i.stack.imgur.com/uQKra.png" alt="Agile WIT"></p>
  
  <p>I don't see any unusual rules on any of the fields?</p>