No config for extending sites menu

It's not possible to easily configure the menu items that appear in the "Sites" menu in the new header bar. Although it is possible by extending the "alfresco/header/AlfSitesMenu" widget it would be preferable to be able to modify default boolean values on the widget to control what is and isn't displayed.

This was raised as a result of a forums discussion: http://forums.alfresco.com/forum/end-user-discussions/alfresco-share/make-options-header-admin-only-alfresco-42d-09022013-1746