Made the context menu highlight context as the active li item, and added...

... a li repeat to show children of context, indented below the highlighted context in the lineage (breadcrumbs style) display. This more complete display matches what is shown in the list item display, and provides a more useful, hyrid breadcrumbs style display. In an unrelated bit, fixed the order of tal:defines to come before the class setting in the bottom repeat in navigation.pt.