Update settings-subpage.jelly

Author: janfaracik

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

@@ -46,8 +46,14 @@ THE SOFTWARE.
       ]]>
     </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:attribute name="includeSidepanel">
+      This is internal only - do not use this.
+      Optional, includes the sidepanel for if the Experimental Manage Jenkins is disabled.
+      Defaults to false if not set.
     </st:attribute>
   </st:documentation>