When activating a collection, if it contains no manifests, recurse into subcollections.
When activating a collection, if it contains no manifests, recurse into subcollections.

britishlibrary/UniversalViewer,britishlibrary/UniversalViewer,britishlibrary/UniversalViewer,britishlibrary/UniversalViewer,britishlibrary/UniversalViewer,britishlibrary/UniversalViewer