No confirm option while deleting files

Hi
Today I deleted a zip file and it’s not in the TRASH area, the Trash folder says No library deleted yet.

There was no option to confirm if I wanted to delete the file, something like, Are You Really Sure You Want To Delete This File . Click OK to Delete

Everyone knows when you create a delete option that there should be a confirm option.

But were is the file gone if its not in the Trash Can ??

Any one help, also I am guessing this is not an option in beta 6 of seafile

Server Version: 5.1.3 Ubuntu 14.4

This might be helpful:
https://www.seafile.com/en/help/restore_files/

Yeah, maybe a question in the webinterface before you delete a file is not that bad. In my experience not every user knows that there is trash or history feature. @daniel.pan