
The port away from the old Shell.GenericContainer actor turned many JS classes with a corresponding actor property into Clutter.Actor subclasses. For compatibility reasons, those properties were kept around for a while. They were now removed and any code that still uses them should be adjusted. Facilitate that transition by defining the compatibility property on Clutter.Actor itself, but log a warning every time it is accessed. https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/487