Improve CSV import resilience
Hotfix to handle empty or None values before trying to convert to a number.
Signed-off-by: Tiemen Schuijbroek t.j.l.schuijbroek@ratio-case.nl
Hotfix to handle empty or None values before trying to convert to a number.
Signed-off-by: Tiemen Schuijbroek t.j.l.schuijbroek@ratio-case.nl