If we're using the proxy fallback panel, ensure we actually open the fallback module

panels/proxy/gnome-proxy-panel.desktop.in.in

 [Desktop Entry]
 _Name=Network Proxy
 _Comment=Set your network proxy preferences
-Exec=gnome-control-center network
+Exec=gnome-control-center proxy
 Icon=gnome-network-properties
 Terminal=false
 Type=Application
@@ -10,8 +10,8 @@ Categories=GNOME;GTK;Settings;X-GNOME-NetworkSettings;X-GNOME-Settings-Panel;
 OnlyShowIn=GNOME;
 X-GNOME-Bugzilla-Bugzilla=GNOME
 X-GNOME-Bugzilla-Product=gnome-control-center
-X-GNOME-Bugzilla-Component=network preferences
+X-GNOME-Bugzilla-Component=proxy preferences
 X-GNOME-Bugzilla-Version=@VERSION@
-X-GNOME-Settings-Panel=network
-# Translators: those are keywords for the network proxy control-center panel
+X-GNOME-Settings-Panel=proxy
+# Translators: those are keywords for the proxy control-center panel
 _X-GNOME-Keywords=Web;Location;