Enhancement: Allow adding multiple items at once with select form

[seanfagan]

It would be great if all the items selected on a Select Form were added to the original menu. Currently, only the first item gets added. See gif:

I noticed this when adding Footsteps (FSTP) to a Footstep Set (FSTS), but I think this same behavior happens with other similar menus. I'm in SSE. Thanks for considering!