gnome-xkb-info.c: Fix incorrect schema name for 'show-all-sources'

gsettings key.

This enables additional, less-common layouts to be displayed in
Cinnamon's keyboard layout picker.

ref #13269.

Author: mtwebster

libcinnamon-desktop/gnome-xkb-info.c

@@ -587,7 +587,7 @@ parse_rules (GnomeXkbInfo *self)
     goto cleanup;
   g_free (file_path);
 
-  settings = g_settings_new ("org.gnome.desktop.input-sources");
+  settings = g_settings_new ("org.cinnamon.desktop.input-sources");
   show_all_sources = g_settings_get_boolean (settings, "show-all-sources");
   g_object_unref (settings);