When receiving backup fails (usually due to packet loss in the Windows HID stack...), attempt to salvage data nevertheless. Add po/Makevars file (reported by wawachief).

Signed-off-by: Lionel Debroux <lionel_debroux@yahoo.fr>
Skip leading UTF-16LE BOM, if any, for programs and notes, as the interpreter chokes on it.

Reported and tested by wawachief.

Signed-off-by: Lionel Debroux <lionel_debroux@yahoo.fr>