[gnome-shell] dateMenu: Set _delegate on non-menu-item menu child

[Florian Müllner <fmuellner src gnome org>]

commit c1758c4d6949ff9b597e60f7ec2696ae506e1739
Author: Florian Müllner <fmuellner gnome org>
Date:   Sat Jun 17 18:14:20 2017 +0200

    dateMenu: Set _delegate on non-menu-item menu child
    
    PopupMenu needs special-treatment of certain types of menu items,
    which it determines via children's _delegate property. However as
    the calendar drop-down is very unmenu-ish, we use regular actors
    rather than PopupMenuItems and the missing _delegate property
    triggers a warning. Just add it as the bare minimum to make
    PopupMenu happy.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=781471

 js/ui/dateMenu.js |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/js/ui/dateMenu.js b/js/ui/dateMenu.js
index 1ce3779..f891ae3 100644
--- a/js/ui/dateMenu.js
+++ b/js/ui/dateMenu.js
@@ -474,6 +474,8 @@ const DateMenuButton = new Lang.Class({
 
         let layout = new FreezableBinLayout();
         let bin = new St.Widget({ layout_manager: layout });
+        // For some minimal compatibility with PopupMenuItem
+        bin._delegate = this;
         this.menu.box.add_child(bin);
 
         hbox = new St.BoxLayout({ name: 'calendarArea' });