Always cache parent visibility in CanvasItem

scene/main/canvas_item.cpp

@@ -350,9 +350,7 @@ void CanvasItem::update_draw_order() {
 }
 
 void CanvasItem::_window_visibility_changed() {
-	if (visible) {
-		_propagate_visibility_changed(window->is_visible());
-	}
+	_propagate_visibility_changed(window->is_visible());
 }
 
 void CanvasItem::queue_redraw() {