community/gnome-shell: depend on networkmanager
GNOME Shell 45+ requires networkmanager to be installed if we build gnome-shell with netorkmanager
Ref: https://github.com/GNOME/gnome-shell/commit/c2c4d84fc15f5164ba86e2bcc2dfe20816f5186d
GNOME Shell 45+ requires networkmanager to be installed if we build gnome-shell with netorkmanager
Ref: https://github.com/GNOME/gnome-shell/commit/c2c4d84fc15f5164ba86e2bcc2dfe20816f5186d