Install indicator-applet-appmenu by entering the following commands in the terminal:
sudo apt update sudo apt install indicator-applet-appmenu
Description:
Clone of the GNOME panel indicator applet
Indicator-applet is an applet to display information from various applications consistently in the GNOME panel. . This instance will load the appmenu indicator.
Homepage: https://launchpad.net/indicator-applet
Version: 12.10.2+17.10.20170425-0ubuntu1
Section: universe/gnome