Use g_app_info_create_from_commandline instead of spawning directly
This has the advantage that it automatically uses the systemd scoping from glib!1596 (closed). Once that is readily available, we can remove gnome_start_systemd_scope
again.
This has the advantage that it automatically uses the systemd scoping from glib!1596 (closed). Once that is readily available, we can remove gnome_start_systemd_scope
again.