Allow Client Version column export in Report Manager

It would be nice to be able to extract the currenty client version when exporting Sessions (Report Type = Session) in the Report Manager extension.

The ClientVersion field is currently only exportable when using Report Type = SessionConnection.

I use a CSV export of my clients to make cross-checks with other internal tools and make sure we don't miss devices in Control (or have too many that we don't have elsewhere), but I would also appreciate to be able to report an old client version.