[libdazzle] example: update example app a bit

[Christian Hergert <chergert src gnome org>]

commit 7c2ca6051342e2caf8b52fb3316368a746fea7b0
Author: Christian Hergert <chergert redhat com>
Date:   Fri Jun 16 14:34:07 2017 -0700

    example: update example app a bit

 examples/app/example-window.ui      |   20 ++++++++++++++++++++
 examples/app/example.gresources.xml |    1 +
 examples/app/themes/shared.css      |    3 +++
 3 files changed, 24 insertions(+), 0 deletions(-)
---
diff --git a/examples/app/example-window.ui b/examples/app/example-window.ui
index 1d971e2..ea02939 100644
--- a/examples/app/example-window.ui
+++ b/examples/app/example-window.ui
@@ -4,6 +4,26 @@
     <child>
       <object class="DzlDockBin" id="dockbin">
         <property name="visible">true</property>
+        <child>
+          <object class="GtkNotebook" id="notebook">
+            <property name="expand">true</property>
+            <property name="visible">true</property>
+            <child>
+              <object class="GtkScrolledWindow">
+                <property name="visible">true</property>
+                <child>
+                  <object class="GtkTextView">
+                    <property name="monospace">true</property>
+                    <property name="visible">true</property>
+                  </object>
+                </child>
+              </object>
+              <packing>
+                <property name="tab-label">Document 1</property>
+              </packing>
+            </child>
+          </object>
+        </child>
       </object>
     </child>
   </template>
diff --git a/examples/app/example.gresources.xml b/examples/app/example.gresources.xml
index 6a6b401..297c1db 100644
--- a/examples/app/example.gresources.xml
+++ b/examples/app/example.gresources.xml
@@ -6,5 +6,6 @@
 
   <gresource prefix="/org/gnome/example">
     <file>gtk/menus.ui</file>
+    <file>themes/shared.css</file>
   </gresource>
 </gresources>
diff --git a/examples/app/themes/shared.css b/examples/app/themes/shared.css
new file mode 100644
index 0000000..1446e00
--- /dev/null
+++ b/examples/app/themes/shared.css
@@ -0,0 +1,3 @@
+textview {
+  padding: 12px;
+}