Ever since commit b8e29ae8c7
(I think), start up is littered with this message:
Gjs-WARNING **: JS ERROR: could not get remote objects for service
org.gnome.SettingsDaemon.Smartcard path
since gnome-shell is now started before gnome-settings-daemon.
This commit addresses the problem by making the object manager code
not try to autostart its proxy, and instead wait for it to appear.
https://bugzilla.gnome.org/show_bug.cgi?id=772589