[FIXED HUDSON-7115] add link to updateCenter in sidepanel of plugin manager pages

once any install/upgrade job has been submitted.


git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@33562 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/resources/hudson/PluginManager/sidepanel.jelly

 <!--
 The MIT License
 
-Copyright (c) 2004-2009, Sun Microsystems, Inc., Kohsuke Kawaguchi
+Copyright (c) 2004-2010, Sun Microsystems, Inc., Kohsuke Kawaguchi
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -30,6 +30,9 @@ THE SOFTWARE.
   <l:side-panel>
     <l:tasks>
       <l:task icon="images/24x24/up.gif" href="${rootURL}/" title="${%Back to Dashboard}" />
+      <j:if test="${!empty(app.updateCenter.jobs)}">
+        <l:task icon="images/32x32/plugin.gif" href="${rootURL}/updateCenter/" title="${%Update Center}" />
+      </j:if>
     </l:tasks>
   </l:side-panel>
-</j:jelly>
\ No newline at end of file
+</j:jelly>