title: How to swap position of tab bar item when refactored storyboard
body: <p>When i refactored storyboard same photo in this 
  <a href="http://i.stack.imgur.com/D8YS8.png" rel="nofollow">link</a>.
  <br/>I can't find where i can swap position of tab bar item. 
  <br/>example i want to change main menu to index 0. 
  <br/>this is my <a href="http://i.stack.imgur.com/99rZy.png" rel="nofollow">storyboard</a>.</p>