missing search gif on plugin manager.

changelog.html

@@ -63,6 +63,8 @@ Upcoming changes</a>
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-13659">issue 13659</a>)
   <li class=bug>
     Fixed JDK auto-installer
+  <li class=bug>
+    missing search image on plugin manager.
 </ul>
 </div><!--=TRUNK-END=-->
 

core/src/main/resources/hudson/PluginManager/_table.css

 #filter-box {
-    background: white url('/images/16x16/search.gif') no-repeat 2px center;
+    background: white url('search.gif') no-repeat 2px center;
     padding-left: 20px;
     width: 15em;
 }