Better keyboard & accessibility for listviews

[viridia]

Tab should navigate to the sibling of the list view, not individual rows.
Up/Down arrow should navigate between rows.
When tabbing into a list view, if no item is selected then it should select the first item.

(See ARIA best practices for guidance. Also https://developer.mozilla.org/en-US/docs/Web/Accessibility/ARIA/Roles/listbox_role)