don't show [+] if the nested view doesn't support it.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@14060 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/resources/lib/hudson/projectViewNested.jelly

@@ -6,11 +6,19 @@
   <tr>
     <td colspan="2">
       <div style="${indenter.getRelativeShift(job)}">
-        <a href="#">
-          <img src="${imagesURL}/tree/plus.png" state="plus" width="14" height="14" alt="" class="fold-control treeview-fold-control"
-               url="${rootURL}/${v.url}/ajaxRows?depth=${h.ifThenElse(depth!=null,depth+1,1)}"/>
-          <st:adjunct includes="lib.hudson.projectViewNested" />
-        </a>
+        <j:choose>
+          <j:when test="${request.getView(v,'ajaxRows.jelly')==null}">
+            <img src="${imagesURL}/none.gif" state="plus" width="14" height="14" alt="" />
+          </j:when>
+          <j:otherwise>
+            <!-- if nested view supports ajaxRows -->
+            <a href="#">
+              <img src="${imagesURL}/tree/plus.png" state="plus" width="14" height="14" alt="" class="fold-control treeview-fold-control"
+                   url="${rootURL}/${v.url}/ajaxRows?depth=${h.ifThenElse(depth!=null,depth+1,1)}"/>
+              <st:adjunct includes="lib.hudson.projectViewNested" />
+            </a>
+          </j:otherwise>
+        </j:choose>
         <img src="${imagesURL}/${iconSize}/folder.gif" style="margin-left:4px" alt="" />
       </div>
     </td>