[gnome-shell] userWidget: Add back missing import

[Florian Müllner <fmuellner src gnome org>]

commit a111bfb90abb0dc9d80ef7a3822dbaf128539520
Author: Florian Müllner <fmuellner gnome org>
Date:   Sat Feb 9 18:49:41 2019 +0100

    userWidget: Add back missing import
    
    This was accidentally dropped in commit a1534dab026.

 js/ui/userWidget.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/js/ui/userWidget.js b/js/ui/userWidget.js
index 05b3b7588..5daf5e73d 100644
--- a/js/ui/userWidget.js
+++ b/js/ui/userWidget.js
@@ -2,7 +2,7 @@
 //
 // A widget showing the user avatar and name
 
-const { Clutter, GLib, GObject, St } = imports.gi;
+const { Clutter, Gio, GLib, GObject, St } = imports.gi;
 
 const Params = imports.misc.params;