[gnome-shell/wip/verdre/hide-overlay-scrollbar] dateMenu: Hide overlay scrollbar in the notification popup

[verdre <jonasd src gnome org>]

commit 60cd1e34215fe66a6dc3113caccb761f36c76806
Author: Jonas Dreßler <verdre v0yd nl>
Date:   Sun Feb 16 21:57:34 2020 +0100

    dateMenu: Hide overlay scrollbar in the notification popup
    
    Since the design of the notification popup changed with the theme
    refactor and there are now boxes around the world-clock and weather
    sections, the overlay scrollbar that is shown above them looks rather
    bad. So simply hide that scrollbar, we still have the vfade effect to
    indicate the container is scrollable and we also depend on that in the
    new popup app-folders.

 js/ui/dateMenu.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/js/ui/dateMenu.js b/js/ui/dateMenu.js
index 63bcbdf5eb..3f6c61bd92 100644
--- a/js/ui/dateMenu.js
+++ b/js/ui/dateMenu.js
@@ -630,7 +630,7 @@ class DateMenuButton extends PanelMenu.Button {
         this._displaysSection = new St.ScrollView({ style_class: 'datemenu-displays-section vfade',
                                                     x_expand: true,
                                                     overlay_scrollbars: true });
-        this._displaysSection.set_policy(St.PolicyType.NEVER, St.PolicyType.AUTOMATIC);
+        this._displaysSection.set_policy(St.PolicyType.NEVER, St.PolicyType.EXTERNAL);
         vbox.add_actor(this._displaysSection);
 
         let displaysBox = new St.BoxLayout({ vertical: true,