Expand patchset if patchsetID provided in URL

appengine/chromium_rietveld/new_static/components/cr-issue-patchset.css

 /*
  * 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.
  */
 
 :host { display: block; }
 
 h2 {
     font-size: 1em;
@@ skipping 40 matching lines @@
 }
 
 .trigger-dry-run {
     margin: 0 0px 0.5em 5px;
 }
 
 #try-job-results h2 {
     margin: 0.5em 16px 0.5em 16px;
 }
 
+.patchset-id {
+    font-size: 0.85em;
+    margin: 0 5px 0.5em 16px;
+}
+
 .spinner {
     vertical-align: middle;
     margin: 0 8px 0 8px;
 }
 
 @media (max-width: 600px) {
     header h2 {
         display: none;
     }
 
     header .ui-actions {
         padding: 0 8px;
     }
 }