Properly handle flatpak'ed steam
A flatpk'ed steam is currently shown as a system process, because the processe being run is not matching the command line in the desktop file, i.e.
/app/bin/steam-wrapper (desktop file) vs
The obvious thing is to open
/proc/<pid>/root and see if there is a
.flatpak-info; if so infer the id from the
[Application] section (
name=com.valvesoftware.Steam) and then associate the
GAppInfo via that.