keyboard: Add keyboard model configuration support
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.
Required PRs:
Related: gnome-control-center#1867
Edited by alaviss