NetworkMenu: defer calling syncSectionTitle until after pushing the device

syncSectionTitle looks at device list for the section, to understand if
the section should be visible or not, so obviously it needs to see the
new device.

I wonder when this broke.

https://bugzilla.gnome.org/show_bug.cgi?id=692749

js/ui/status/network.js

@@ -1934,10 +1934,10 @@ const NMApplet = new Lang.Class({
         section.addMenuItem(wrapper.statusItem);
         section.addMenuItem(wrapper.section);
 
-        this._syncSectionTitle(wrapper.category);
-
         let devices = this._devices[wrapper.category].devices;
         devices.push(wrapper);
+
+        this._syncSectionTitle(wrapper.category);
     },
 
     _deviceRemoved: function(client, device) {