e1c454bd21
Since commit 9c2da01a9, the avatar's child is expanded to account for the new St.Bin behavior. However as expand flags are propagated up, this now results in avatar actor getting unintentionally expanded in places like the end-session dialog. Stop this by explicitly setting the avatar actor to not expand. Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/3221>