Make it possible to view password protected folders via shared token

This hopefully small feature request relates to the beautifully implemented feature #74.

Password protected shares are (at least for me) currently not be redirected to the authentication screen for
https://cloud.domain.com/apps/memories/s/{token}
as for e.g. files would've
https://cloud.domain.com/s/{token}
and the view is just shown with placeholder thumbnails