templates/directory-display: Display message when directory/revision is missing
That message can only be displayed when browsing a directory in a snapshot context, for instance when browsing a branch whith a non resolvable revision.
I picked a quite generic error message, maybe it could be improved to mention the revision is not resolvable ?
Related to #2353 (closed)
Migrated from D3042 (view on Phabricator)