web UI: empty repository reported as 404 snapshot not found
this repo points to an empty snapshot (see the Web API for further details), but when visiting them via the Web UI the user message is "NotFoundExc: Snapshot with id 06aa59fa9a87b85f171bc1529d41a04c4bff18cd not found!".
We should just say that the repo/snapshot is empty, as no user would understand the meaning of the current message.
Migrated from T2429 (view on Phabricator)
Edited by Phabricator Migration user