Expand patchset if patchsetID provided in URL

appengine/chromium_rietveld/new_static/components/cr-patchset-header.html

 <!-- Copyright (c) 2014 The Chromium Authors. All rights reserved.
 Use of this source code is governed by a BSD-style license that can be
 found in the LICENSE file. -->
 
 <link rel="import" href="../common/cr-action.html">
 <link rel="import" href="../common/cr-date.html">
 <link rel="import" href="cr-patchset-edit-dialog.html">
 
 <polymer-element name="cr-patchset-header" attributes="patchset">
     <template>
@@ skipping 15 matching lines @@
                 flex: 1;
                 -webkit-flex: 1;
             }
 
             .patchset-actions,
             .patchset-comments,
             .patchset-date {
                 margin-left: 8px;
             }
         </style>
-        <div class="patchset-title">
+        <div class="patchset-title" title="{{ patchset.id }}">
             Patch {{ patchset.sequence }}<template if="{{ patchset.title }}">: {{ patchset.title }}</template>
         </div>
         <div class="patchset-comments">
             {{ patchset.messageCount - patchset.draftCount | pluralize("comment") }}
             <template if="{{ patchset.draftCount }}">
                 <template if="{{ patchset.messageCount - patchset.draftCount }}">,</template>
                 {{ patchset.draftCount | pluralize("draft") }}
             </template>
         </div>
         <div class="patchset-date"><cr-date date="{{ patchset.created }}" relative></cr-date></div>
@@ skipping 27 matching lines @@
                 dialog.patchset = this.patchset;
                 dialog.addEventListener("close", function() {
                     dialog.remove();
                 });
                 this.$.dialogs.appendChild(dialog);
                 dialog.showModal();
             },
         });
     </script>
 </polymer-element>