Emitted when the session manager is about to end the session, only
if #GtkApplication::register-session is %TRUE. Applications can
connect to this signal and call gtk_application_inhibit() with
%GTK_APPLICATION_INHIBIT_LOGOUT to delay the end of the session
until state has been saved.
Emitted when the session manager is about to end the session, only if #GtkApplication::register-session is %TRUE. Applications can connect to this signal and call gtk_application_inhibit() with %GTK_APPLICATION_INHIBIT_LOGOUT to delay the end of the session until state has been saved.