Since I updated my machine today, it is not possible to click "Enable networking" or "Enable wifi" in the nm-applt. It seems to be a permission problem because if I launch nm-applet as root, there is no issue.

It already happened in the past but adding myself to the `netdev` group solved the problem. This time however, I don't find a solution...

Additional info:

* Debian 9.2
* network-manager 1.6.2-3

Additional info requested by GAD3R:

```
$ tail /etc/xdg/autostart/nm-applet.desktop
Icon=nm-device-wireless
Exec=nm-applet
Terminal=false
Type=Application
NoDisplay=true
NotShowIn=KDE;GNOME;
X-GNOME-Bugzilla-Bugzilla=GNOME
X-GNOME-Bugzilla-Product=NetworkManager
X-GNOME-Bugzilla-Component=nm-applet
X-GNOME-UsesNotifications=true

```