I'm on Ubuntu 18.04 with GNOME, and I'd like to use use fcitx instead of iBus because I usually type East Asian languages. I installed the fcitx package, went into Language Support, and changed "keyboard input method system" to fcitx. However, after I reboot, I still get the iBus input method menu. How can I finally get rid of iBus and switch fully to fcitx?
(Please do not convince me to stay with iBus; Sun Pinyin and ibus-mozc are virtually unusable.)