title: User Roles Not Getting Updated
body: <p>I am facing a issue in Sitecore UI when I am editing an existing user to add/delete <strong>'User Roles'</strong> under the <strong>'Member Of'</strong> tab, its not getting updated. However, when I am adding a <strong>New User</strong> and assigning the User Roles, then it shows up correct. Any idea whats causing this issue/Or anyone else faced the same? </p>
  
  <p>This issue is also referenced by some other person <a href="http://sdn.sitecore.net/SDN5/Forum/ShowPost.aspx?postid=47611" rel="noreferrer">here</a>.
  I attached an image for more reference!</p>
  
  <p>Tried looking up online but in vain, hope someone can assist me on this. Thanks in advance!<img src="https://i.stack.imgur.com/ji2o4.jpg" alt="Refer to this image for further reference."></p>
  
  <p>EDIT: Step by step of what I am doing:</p>
  
  <p><img src="https://i.stack.imgur.com/Nl3Qk.jpg" alt="Selecting the user">
  <img src="https://i.stack.imgur.com/HqmuK.jpg" alt="Clicking on the edit button">
  <img src="https://i.stack.imgur.com/azmXx.jpg" alt="Adding &#39;Marketing Designer&#39; User Roles to that particular user">
  <img src="https://i.stack.imgur.com/Kcy9Z.jpg" alt="Its shows that Marketing Designer is added, I clicked &#39;OK&#39; after this. No popup confirmation.">
  <img src="https://i.stack.imgur.com/BegtI.jpg" alt="Clicked on that User again and edit: Marketing Designer is NOT added."></p>
  
  <p>Hope this illustrate the problem much better!</p>