Do not definitively delete a document synced elsewhere

Steps:

• save the file somewhere in a Folder in Nuxeo
• unsynchronize the folder
• delete it from the save (in Nuxeo)
• synchronize the folder again
• save the file again

Actual result:

• the file is hard deleted, not in the trash

Expected result:

• show a notification
• move the file to the trash

To be more precise: it is a case where a local document has metadata, so it was synced from one server at a given time. Drive analyses it and sees that the file has metadata but it does not exist on the server. It is saw as a remote deletion and so Drive deletes the file locally.

The error is that we are definitely removing the file instead of moving it to the trash.
But this is not an issue regualar users may encounter. It happens when doing a lot of testing.