dad06fa423
Enables the use of a new `xkb-model` dconf key to let user configure their desired keyboard model. Also included is additional glue for respecting X11Model set at the system level (ie. via `localectl`). For simplicity, this assumes the use of one global keyboard model. Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2583>