Anton Shestakov <av6@dwimlabs.net>, Sun, 16 Jan 2022 23:54:58 +0300
gtk3: turns out there WAS a setting for this
etc/default/keyboard
Permissions: -rw-r--r--
# KEYBOARD CONFIGURATION FILE
# Consult the keyboard(5) manual page.
XKBOPTIONS="grp:caps_toggle,lv3:ralt_switch_multikey,compose:rwin,grp_led:scroll"