filetool doesn't show errors

[jls]

Hi
I've some non existent items on my /opt/.filetool.lst but the filetool gui doesn't show the error.

[Jason W]

I remember hiding the terminal output of backup as there was a harmless error being echoed, but yeah, there needs to be output on errors.  Will fix.

[Jason W]

Actually, nothing was changed and this is the same behavior as seen in Core7, errors are echoed to /tmp/backup_status.

However,  I can also echo those errors to the output so one will know if there was a non fatal error.

EDIT:  I really don't want to change behavior of the base tools shared between Core and dCore except where it is necessary, and this is not a dCore specific issue so I would rather leave it as is.