72c6f0025d
Most of the code handles the sources setting being empty and InputSourceManager.currentSource being null because previously the "model" (i.e. the sources list) was kept in gnome-settings-daemon. But this is fragile and since we're now the canonical place where the list lives we can force it to never be empty even if the gsetting is empty or contains only invalid entries. Adding the default keyboard layout in that case is the safest thing to do. https://bugzilla.gnome.org/show_bug.cgi?id=738303