The source project of this merge request has been removed.
Fix invalid cast error
Resetting a property in the Settings Editor does not remove the row and gives this error:
(xfce4-settings-editor:6354): GLib-GObject-WARNING **: 10:44:25.290: invalid cast from 'GtkTreeModelFilter' to 'GtkTreeStore'
(xfce4-settings-editor:6354): Gtk-CRITICAL **: 10:44:25.290: gtk_tree_store_remove: assertion 'GTK_IS_TREE_STORE (tree_store)' failed