The Sortable Table component used in Databases and Collections table can potentially display thousands of namespaces. This can generate more DOM nodes than is visible to the user.

The goal of this ticket is to use the react-virtualized module introduced in COMPASS-391 to render only a subset of the namespaces at a time that will be visible to the user.

It might be useful to turn the react-virtualized list into a generic component under hadron-react-components that is used by sortable table and the sidebar.