title: How to add more items to Priority dropdown in TFS work item
body: <p>I've created TFS project based on MSF for CMMI process template.</p>
  
  <p>For any type of work item I can only select priority between 1 and 3 which is not enough precise for our process. </p>
  
  <p>How can I widen this priority range, so that I have, for example, priorities 1-8 using process explorer UI? </p>