
We trigger the "locate-pointer" mechanism when a special key modifier (defaults to Control_L) key is pressed and released. https://gitlab.gnome.org/GNOME/mutter/merge_requests/453 https://gitlab.gnome.org/GNOME/gnome-shell/issues/981 https://gitlab.gnome.org/GNOME/gsettings-desktop-schemas/merge_requests/19 https://gitlab.gnome.org/GNOME/gnome-settings-daemon/merge_requests/86