Improved the context menu, within handling for include_root, top_level_items, and a new lineage_items.
Added indentation for items in the lineage items in the context menu. Added a kotti-override for nav.pt, so that the navigation.pt template can be used up top, to replace nav.pt. This requires a new none setting for slot, or its omission, and new handling for this case to avoid assigning to a slot when the nav.pt overriding is done.
Added missing kotti-overrides.
Merge pull request #3 from geojeff/context_menu

Context menu