
In some deployments showing a user list at the login screen is undesirable. GDM's fallback login screen has a configuration key: org.gnome.login-screen disable-user-list false that causes the user-list to get hidden. This commit adds similar functionality to the normal, shell-based login screen. Based on a series of patches by Marius Rieder. https://bugzilla.gnome.org/show_bug.cgi?id=660660