title: How to not change CWD in NerdTree when open file node?
body: <p>How do I prevent NERDTree from changing the CWD when I open a file node?</p>
  
  <p>I usually open a project folder with</p>
  
  <pre><code>cd apps/project
  vim .
  </code></pre>
  
  <p>I want NERDTree's current working directory to be fixed with (apps/project) when i open a file node.</p>
  
  <p>I tried <code>:let NERDTreeChDirMode=0</code>, but it does not work.</p>