[gnome-music/wip/mschraal/gtk4] notificationspopup: Workaround ui deprecation

[Marinus Schraal <mschraal src gnome org>]

commit f9483a4850861d5bb2150ac2b81728b7ae375c91
Author: Marinus Schraal <mschraal gnome org>
Date:   Wed Apr 29 00:58:10 2020 +0200

    notificationspopup: Workaround ui deprecation

 data/ui/NotificationsPopup.ui | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/data/ui/NotificationsPopup.ui b/data/ui/NotificationsPopup.ui
index ae2d3007..cbbf754d 100644
--- a/data/ui/NotificationsPopup.ui
+++ b/data/ui/NotificationsPopup.ui
@@ -7,7 +7,9 @@
     <child>
       <object class="GtkFrame">
         <property name="visible">True</property>
+<!--
         <property name="shadow_type">none</property>
+-->
         <child>
           <object class="GtkGrid" id="_grid">
             <property name="visible">True</property>