This way we can have a handle of the errors in the high-level
components. Before they were implicitly discarded.

This is to trigger reloading of main page.

NOTE: This still doesn't work fully

No Box needed.

Components are simplified, some duplicated props are removed.

However, still I see too many pages reported wrt the results
returned (i.e. couple last pages are empty).

The pagination on ngramstable is still broken – pages > 1 don't render
any results even if network analysis shows data wasn't empty.

Otherwise, reload only tree.