[gnome-games] error-info-bar: Add response signal handler

[Alexander Mikhaylenko <alexm src gnome org>]

commit 29d2082635536b0a641c2fd6e36d9cd02100797f
Author: Yetizone <andreii lisita gmail com>
Date:   Mon Feb 18 15:58:50 2019 +0200

    error-info-bar: Add response signal handler

 data/ui/error-info-bar.ui  | 1 +
 src/ui/error-info-bar.vala | 5 +++++
 2 files changed, 6 insertions(+)
---
diff --git a/data/ui/error-info-bar.ui b/data/ui/error-info-bar.ui
index 78e44f09..ad62ae90 100644
--- a/data/ui/error-info-bar.ui
+++ b/data/ui/error-info-bar.ui
@@ -7,6 +7,7 @@
     <property name="valign">start</property>
     <property name="show-close-button">True</property>
     <property name="message-type">error</property>
+    <signal name="response" handler="on_response"/>
     <child internal-child="content_area">
       <object class="GtkBox" id="content_area">
         <child>
diff --git a/src/ui/error-info-bar.vala b/src/ui/error-info-bar.vala
index 06e7c24b..b2812509 100644
--- a/src/ui/error-info-bar.vala
+++ b/src/ui/error-info-bar.vala
@@ -13,4 +13,9 @@ private class Games.ErrorInfoBar : Gtk.InfoBar {
        public string message {
                set { label.label = value; }
        }
+
+       [GtkCallback]
+       private void on_response () {
+               revealed = false;
+       }
 }