title: Bootstrap accordion collapse height issue
body: <p>i have been using the collapse module for a while but have now found an issue with items that are quite long eg. more than a few paragraphs.</p>
  
  <p>It seems that depending upon the number of items you have a height attribute is added to the outermost div as per below:</p>
  
  <pre><code> div class="accordion in collapse" id="accordion2" style="height: 348px;"
  </code></pre>
  
  <p>So when you expand an item it only expands to the height given above. If I un-check this whilst in developer mode it all works perfectly.</p>
  
  <p>What I can't find is where in the bootstrap.js it adds this style attribute.</p>