status/network: Fix VPN toggle not working when clicking the switch (LP: 2120331)
VPN activation is triggered by clicking/touching the item, however, the switch is reactive and blocks clicking/touching event so item won't be activated. Manually activate item when switch is toggled to fix that.
Closes https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/8204
Part-of: https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/3711