It has [been reported](https://github.com/paradoxxxzero/gnome-shell-system-monitor-applet/issues/389#issuecomment-403486946) that Gnome Shell is removed when the [networkmanager package](https://github.com/painless-software/ansible-software/blob/master/roles/base/tasks/desktop.yml#L18) is installed. We need to make sure this doesn't happen to avoid compromising the target system.