[gtk/matthiasc/for-master: 4/6] gtk-demo: Improve the builder demo

[Matthias Clasen <matthiasc src gnome org>]

commit 82ce1a9d6b43e753a5e767813646c81e68e149e8
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Sep 14 16:51:05 2020 -0400

    gtk-demo: Improve the builder demo
    
    Make the toolbar look right.

 demos/gtk-demo/demo.ui | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/demos/gtk-demo/demo.ui b/demos/gtk-demo/demo.ui
index c93d6d46b5..bd541040dd 100644
--- a/demos/gtk-demo/demo.ui
+++ b/demos/gtk-demo/demo.ui
@@ -110,6 +110,9 @@
         </child>
         <child>
           <object class="GtkBox" id="toolbar1">
+            <style>
+              <class name="toolbar"/>
+            </style>
             <child>
               <object class="GtkButton">
                 <property name="label" translatable="yes">New</property>