[gnome-games] display-box: Fix the last commit

[Alexander Mikhaylenko <alexm src gnome org>]

commit d9fbe194f0dac01574e34d33e2f7de8390efaf70
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Fri Mar 27 00:10:12 2020 +0500

    display-box: Fix the last commit
    
    Oops

 data/ui/display-box.ui | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/data/ui/display-box.ui b/data/ui/display-box.ui
index 8f025655..84267862 100644
--- a/data/ui/display-box.ui
+++ b/data/ui/display-box.ui
@@ -4,6 +4,7 @@
   <template class="GamesDisplayBox" parent="GtkBin">
     <property name="visible">True</property>
     <signal name="notify::is-showing-snapshots" handler="block_autohide_changed"/>
+    <signal name="notify::is-menu-open" handler="block_autohide_changed"/>
     <child>
       <object class="GamesFullscreenBox" id="fullscreen_box">
         <property name="visible">True</property>