The default shortcut for toggling between keyboards -- in my case between English and Russian -- is SUPER + SPACE. I would like to change this to the more usual default, ALT + SHIFT that I use on all my systems. There is an option to do this in the FLX1s settings, but it has no effect. I have also tried the usual Debian approach via /etc/default/keyboard (see attached), but this also has no effect even after reboot. The toggle to switch between keyboards steadfastly remains SUPER + SPACE. And so, how does one change the keyboard toggle on the FLX1s?