Export Selections in Flattened Export mode

Etienne CAUSSE

Hi all,
In the current Excel export option, there's a very practical option to "export selections" along with the file. This is very useful for people using this data afterwards to keep track of the perimeter.

However, it's not available when using the "flat" export.

Idea : add this option for flat export (if necessary, includ the selection in a separate tab).

Thanks !