Added event listener to reset the author cache.
Added comments to reveal available variables.
Optimized AuthorCacheBuilder.
Removed obsolete import.
Fixed cache issue with layout template relation.
Fixed custom menu links.
Fixed link issue with nested categories and pages.
Fixed problems with nested lists.
Fixed adding menu item hierarchy.
Use WCF style to add and manage menu items.
Fixed sorting issue with menu items.
Added missing imports.