Clutter.Stage.get_key_focus() now always returns the value of the Clutter.Stage.keyFocus property, whereas previously it would return the stage itself when no explicit focus was set. Adjust the code accordingly. Closes: https://gitlab.gnome.org/GNOME/gnome-shell-extensions/-/issues/561 Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell-extensions/-/merge_requests/395>