Add noDefer for settings-subpage

Author: timja

core/src/main/resources/lib/layout/settings-subpage.jelly

@@ -49,6 +49,11 @@ THE SOFTWARE.
       Optional breadcrumb, will add a breadcrumb for the current <code>it</code>
       ]]>
     </st:attribute>
+    <st:attribute name="noDefer">
+      Optional, disables the deferred loading for the page.
+      This can be useful if you need to access 'request2' or do advanced JavaScript.
+      Defaults to false if not set.
+    </st:attribute>
   </st:documentation>
 
   <j:new className="hudson.model.ManageJenkinsAction" var="manageJenkinsAction" />
@@ -105,30 +110,35 @@ THE SOFTWARE.
             <div class="app-settings-container__inner">
               <j:if test="${!attrs.containsKey('header')}">
                 <l:app-bar title="${managementLink.displayName}" />
-                <j:if test="${!empty(managementLink.description)}">
-                  <div class="jenkins-page-description">
-                    ${managementLink.description}
-                  </div>
-                </j:if>
+                <div class="jenkins-page-description">
+                  ${managementLink.description}
+                </div>
               </j:if>
 
               <j:out value="${attrs.header}" />
 
-              <l:defer>
-                <l:defer.placeholder>
-                  <j:choose>
-                    <j:when test="${attrs.containsKey('placeholder')}">
-                      <j:out value="${attrs.placeholder}" />
-                    </j:when>
-                    <j:otherwise>
-                      <l:skeleton type="form" />
-                    </j:otherwise>
-                  </j:choose>
-                </l:defer.placeholder>
-                <l:defer.children>
+              <j:choose>
+                <j:when test="${!attrs.noDefer}">
+                  <l:defer>
+                    <l:defer.placeholder>
+                      <j:choose>
+                        <j:when test="${attrs.containsKey('placeholder')}">
+                          <j:out value="${attrs.placeholder}" />
+                        </j:when>
+                        <j:otherwise>
+                          <l:skeleton type="form" />
+                        </j:otherwise>
+                      </j:choose>
+                    </l:defer.placeholder>
+                    <l:defer.children>
+                      <d:invokeBody />
+                    </l:defer.children>
+                  </l:defer>
+                </j:when>
+                <j:otherwise>
                   <d:invokeBody />
-                </l:defer.children>
-              </l:defer>
+                </j:otherwise>
+              </j:choose>
             </div>
           </div>
         </l:main-panel>