Improve fuzz counts

fuzzer/res/imp/fuzzer-collapse-file-sk.html

 <!--
   The fuzzer/res/fuzzer.js file must be included before this file.
 
   This in an HTML Import-able file that contains the definition
   of the following elements:
 
     <fuzzer-collapse-file-sk>
 
   This element will poll /json/list
 
@@ skipping 58 matching lines @@
         <a href$="{{_getDetailsLink(category, file)}}">{{file.fileName}}</a>
         -- {{file.count}} crash-causing fuzzes
       </h3>
       </summary-sk>
       <template is="dom-if" if="[[expand]]">
         <template  is="dom-repeat" items="{{file.byFunction}}" as="func" sort="_byCount">
           <fuzzer-collapse-function-sk
             class="func-group"
             func="{{func}}"
             details-base="{{_getDetailsLink(category, file)}}"
-          ></fuzzer-collapse-function-sk>
+            expand="[[expand]]" ></fuzzer-collapse-function-sk>
         </template>
       </template>
     </details-sk>
   </template>
   <script>
   Polymer({
     is: 'fuzzer-collapse-file-sk',
 
     properties: {
       file: { //expected to be provided
@@ skipping 29 matching lines @@
       }
       var base = fuzzer.getLinkToDetails("/category/"+category, "file", file.fileName);
       if (func) {
         base = fuzzer.getLinkToDetails(base, "func", func.functionName);
       }
       return base;
     }
   });
   </script>
 </dom-module>