[gnome-control-center/wip/gbsneto/list-layout: 17/19] window: add a nice placeholder view

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit cf4a8a4cae08cdc0160528e2dc157c484b111c6f
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Sun May 22 14:48:55 2016 -0300

    window: add a nice placeholder view
    
    https://bugzilla.gnome.org/show_bug.cgi?id=766922

 shell/window.ui |   50 ++++++++++++++++++++++++++++++++++++++++++++------
 1 files changed, 44 insertions(+), 6 deletions(-)
---
diff --git a/shell/window.ui b/shell/window.ui
index 66d2a80..e6ceb33 100644
--- a/shell/window.ui
+++ b/shell/window.ui
@@ -108,17 +108,55 @@
               <object class="GtkBox">
                 <property name="visible">True</property>
                 <property name="can_focus">False</property>
-                <property name="hexpand">True</property>
-                <property name="vexpand">True</property>
                 <property name="orientation">vertical</property>
-                <child>
-                  <placeholder/>
+                <property name="spacing">12</property>
+                <property name="expand">True</property>
+                <property name="halign">center</property>
+                <property name="valign">center</property>
+                <child type="center">
+                  <object class="GtkImage">
+                    <property name="visible">True</property>
+                    <property name="can_focus">False</property>
+                    <property name="pixel_size">72</property>
+                    <property name="icon_name">preferences-system-symbolic</property>
+                    <style>
+                      <class name="dim-label"/>
+                    </style>
+                  </object>
+                  <packing>
+                    <property name="expand">False</property>
+                    <property name="fill">True</property>
+                    <property name="position">0</property>
+                  </packing>
                 </child>
                 <child>
-                  <placeholder/>
+                  <object class="GtkLabel">
+                    <property name="visible">True</property>
+                    <property name="can_focus">False</property>
+                    <property name="label" translatable="yes">Welcome to the Control Center</property>
+                    <attributes>
+                      <attribute name="weight" value="bold"/>
+                      <attribute name="scale" value="1.44"/>
+                    </attributes>
+                  </object>
+                  <packing>
+                    <property name="pack-type">end</property>
+                    <property name="position">2</property>
+                  </packing>
                 </child>
                 <child>
-                  <placeholder/>
+                  <object class="GtkLabel">
+                    <property name="visible">True</property>
+                    <property name="can_focus">False</property>
+                    <property name="label" translatable="yes">Select a panel in the sidelist to see the 
available options</property>
+                    <style>
+                      <class name="dim-label"/>
+                    </style>
+                  </object>
+                  <packing>
+                    <property name="pack-type">end</property>
+                    <property name="position">1</property>
+                  </packing>
                 </child>
               </object>
               <packing>