title: Why can't I assign my merge request to a specific user in Gitlab
body: <p>We are using gitlab to serve our git repositories. Now I've cloned our master project to track my own changes and now I would like to create a merge request to the master again. When I look at the youtube movie, I can see Job selecting a user to assign the merge request to. In my version this whole drop-down box is missing.</p>
  
  <p>Is this because I use version 6.8.2, is it because I do a merge request from a fork? What is happening here?</p>
  
  <p>I would like to be able to select an other team member to review the commit before merging it into the master project.</p>