[gtk/nana-4/gtk-sidebar-style-fixes: 8/8] icon-browser: Add .sidebar style class in the main window

[Jakub Steiner <jimmac src gnome org>]

commit 3e996f61ae004c9fdad2fc175b06b6c7314de8db
Author: nana-4 <hnmaigo gmail com>
Date:   Sun Nov 22 13:54:44 2020 +0900

    icon-browser: Add .sidebar style class in the main window
    
    So the sidebar can get the proper background and border colors.

 demos/icon-browser/window.ui | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)
---
diff --git a/demos/icon-browser/window.ui b/demos/icon-browser/window.ui
index 84658e3799..7dc204e41f 100644
--- a/demos/icon-browser/window.ui
+++ b/demos/icon-browser/window.ui
@@ -66,11 +66,14 @@
       <object class="GtkBox">
         <child>
           <object class="GtkScrolledWindow">
+            <style>
+              <class name="sidebar"/>
+            </style>
             <property name="hscrollbar-policy">never</property>
             <child>
               <object class="GtkListView">
                 <style>
-                  <class name="navigation-sidebar" />
+                  <class name="navigation-sidebar"/>
                 </style>
                 <property name="model">
                   <object class="GtkSingleSelection" id="context_model">
@@ -108,11 +111,6 @@
             </child>
           </object>
         </child>
-        <child>
-          <object class="GtkSeparator">
-            <property name="orientation">vertical</property>
-          </object>
-        </child>
         <child>
           <object class="GtkBox" id="content_box">
             <property name="orientation">vertical</property>