[FIXED] Cannot Rollback Share

I created a snapshot for a share used by btsync docker.
After playing around I am not able to roll back the share to the create snapshot because of this error

I also fixed the error message that a Samba Shared Share cannot be rolled back, but this is now annoying because all data is lost otherwise.

I deleted all the content within the share and a rollback was possible.
It would be nice to offer the option within the webui, to rollback and delete the data before, otherwise CLI is needed again which does not really fit into the concept.