title: extjs 6.0 create a treelist NavigationTree
body: <p>has anyone here create a treelist by extjs ,I know the sources of this sample are in the extjs version, but i have no idea how to get the treelist </p>
  
  <p>just because it <strong>Highly integrated</strong> by mvc , 
  I create my workspace like this <a href="http://i.stack.imgur.com/3BfyX.png" rel="nofollow">enter image description here</a></p>
  
  <p>But when I saw the source code , I don't know which one is view, which one is model or store and how they work together.
  <a href="http://i.stack.imgur.com/3BfyX.png" rel="nofollow">enter image description here</a></p>
  
  <p>sorry my question is silly,hope someone can help me!! thanks a lot</p>