IntelliJ Idea Ctrl+Alt+Left shortcut doesn't work in Ubuntu

Question

I am using IntelliJ Idea 2017.3 latest release in Ubuntu 2017.10 and shortcut Ctrl+Alt+Left/Right doesn\'t work.

Whereas from

Answer 1

I just found out that my IDEA 2018.3 in Ubuntu 18.04 automatically uses default for GNOME keymap, and the Back/Forward shotcut turns out to be Alt + Shift + Left/Right, no need to change any system settings.