Revert "Prevent visibility notification been called twice in object creation"

This reverts commit d42b17607ef14aeb72036f8747eb4d5c64979872.

scene/2d/canvas_item.cpp

@@ -272,8 +272,7 @@ bool CanvasItem::is_visible_in_tree() const {
 
 void CanvasItem::_propagate_visibility_changed(bool p_visible) {
 
-	if (!first_draw)
-		notification(NOTIFICATION_VISIBILITY_CHANGED);
+	notification(NOTIFICATION_VISIBILITY_CHANGED);
 
 	if (p_visible)
 		update(); //todo optimize