TNL-1898

Also adds a generic paginated list view and Teams list view. The
common PaginatedView takes a collection and a view class for its items
and creates a header and footer with correct pagination. The topics
list view is refactored to use this generic view.

Authors:
  - Peter Fogg <pfogg@edx.org>
  - Daniel Friedman <dfriedman58@gmail.com>