this might help creating an actual layout entry in the official layout switcher (no more xkbcomp)
- https://medium.com/@damko/a-simple-humble-but-comprehensive-guide-to-xkb-for-linux-6f1ad5e13450
- http://wiki.neo-layout.org/wiki/Neo%20unter%20Linux%20einrichten/xkbmap
and this for making the arrows work in more apps: