Change navigation to avoid duplication between Sitemap and Menu.
Removed SItemapItem and move refresh functions to utils
Moved sitemaps to seperate file
Fixed problems with order of items after refresh
FIxed problem with detecting active pages
Fixed problem with clearning menu
Added calendar to example site
Improved JS performance
Enabled menus to not belong to sitemap
Fixed how menu items are update from sitemap
Changed how disabled pages are marked
Improved styling of example app
Fixed problem with deleting old menu items