Polyseat 0.47.4

Share says what is in the way. Sharing a Faugus game was refused with
"Faugus is open here" while no Faugus window was open anywhere: the EA App,
started through Faugus, sat in the tray and kept Faugus's runner alive, and
the runner writes the whole game list back when it ends, which would have put
the moved game's old place back. The refusal now names what runs, "Faugus is
running EA App here", the title as Faugus shows it, and "Faugus is open" only
when it is the window.

Lutris had no such check at all, because it keeps no list it would write
back. What it can do is run the very game being shared, and the move then
pulled its folder out from under it. Share on a Lutris game now waits while
any of the person's processes runs out of that game's folder, and says
"Lutris is running Madison here" when one does.

No seat needs building again.