function _isBlockElement(node) {
    return dom.getStyle("display").from(node) === "block";
  }
Unwraps an unordered/ordered list

@param {Element} element The list element which should be unwrapped

@example
   <!-- Assume the following dom: -->
   <ul id="list">
     <li>eminem</li>
     <li>dr. dre</li>
     <li>50 Cent</li>
   </ul>

   <script>
     wysihtml5.dom.resolveList(document.getElementById("list"));
   </script>

   <!-- Will result in: -->
   eminem<br>
   dr. dre<br>
   50 Cent<br>