Removed _change_notify

-For inspector refresh, the inspector now detects if a property change by polling a few times per second and then does update the control if so. This process is very cheap.
-For property list refresh, a new signal (property_list_changed) was added to Object. _change_notify() is replaced by notify_property_list_changed()
-Changed all objects using the old method to the signal, or just deleted the calls to _change_notify(<property>) since they are unnecesary now.

scene/3d/visual_instance_3d.cpp

@@ -43,7 +43,6 @@ void VisualInstance3D::_update_visibility() {
 		return;
 	}
 
-	_change_notify("visible");
 	RS::get_singleton()->instance_set_visible(get_instance(), is_visible_in_tree());
 }