title: PhpStorm CSS code completion does not work on Twig extended templates
body: <p>I'm using PhpStorm 2016.1. I have these files and the situation is described below:</p>
  
  <pre><code>@mycss
  .style {color : red}
  
  @base.html.twig
  [...]
  &lt;link rel="stylesheet" href="/vendor/mycss.css" /&gt;
  &lt;!--HERE AUTOCOMPLETE OF style WORKS--&gt;
  {%block test%}{%endblock%}
  
  
  @page.html.twig
  {% extends "MyController::base.html.twig" %}
  &lt;!--HERE AUTOCOMPLETE OF style NOT WORKS--&gt;
  {%block test%}{%endblock%}
  </code></pre>
  
  <p>How to fix that in order to have autocomplete on all files?</p>
  
  <p><strong>EDIT</strong></p>
  
  <p>It's not a TWIG problem.
  I don't create new styles in children templates. </p>
  
  <p>I use symlinks (es. /main.css -> /vendor/css/main.css) and that should cause a problem (don't know why). If I for example write small- (foundation grid) + ctrl + space (ask for code completation) the IDE seems to go in some kind of loop, the CPU go to 100% and it keep "loading" while it throw a memory error...</p>