[gnome-boxes] icon, list-view: Wrap views in widgets that draw backgrounds

[Felipe Borges <felipeborges src gnome org>]

commit a0bce3c032802283ae86f1234bb13662ef11d32d
Author: Felipe Borges <felipeborges gnome org>
Date:   Fri May 4 13:57:48 2018 +0200

    icon, list-view: Wrap views in widgets that draw backgrounds
    
    GtkViewPort and GtkScrolledWindow won't draw any backgrounds,
    causing a black margin effect whenever the view is not filling
    the whole internal area.
    
    The problem is easily circumvented by using a widget such as
    GtkBox which draws its background.
    
    See https://gitlab.gnome.org/GNOME/gtk/issues/694

 data/ui/icon-view.ui | 2 +-
 data/ui/list-view.ui | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/data/ui/icon-view.ui b/data/ui/icon-view.ui
index 11556693..de9237b4 100644
--- a/data/ui/icon-view.ui
+++ b/data/ui/icon-view.ui
@@ -7,7 +7,7 @@
     <property name="vscrollbar-policy">automatic</property>
 
     <child>
-      <object class="GtkViewport" id="viewport">
+      <object class="GtkBox">
         <property name="visible">True</property>
         <style>
           <class name="view"/>
diff --git a/data/ui/list-view.ui b/data/ui/list-view.ui
index 47eb4a0d..131ef247 100644
--- a/data/ui/list-view.ui
+++ b/data/ui/list-view.ui
@@ -7,7 +7,7 @@
     <property name="vscrollbar-policy">automatic</property>
 
     <child>
-      <object class="GtkViewport" id="viewport">
+      <object class="GtkBox">
         <property name="visible">True</property>
         <style>
           <class name="view"/>