Install indicator-appmenu-tools by entering the following commands in the terminal:
sudo apt update sudo apt install indicator-appmenu-tools
Description:
Tools for debuging application menus.
. This package provides tools for supporting application menus.
Homepage: http://launchpad.net/indicator-appmenu
Version: 15.02.0+16.10.20160927-0ubuntu3
Section: universe/gnome