message: Updated: introduce CSS GridLayout for the list of endponts.
diff: dmc-endpoints.Page.EndpointsPage
  - .EndpointsPage__list
  + .EndpointsPage__list(ref="list")
  .EndpointsPage__addCard(ref="touch" onTap="handleEndpointAddTap")
  dmc-icon(type="plus")
  virtual(each="{ endpoint, key in endpoints }")
  