[gnome-todo] empty-list-widget: Use a center box to align the widgetry

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

commit ab998b50391744a2bd24159babfc860b02590e46
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Mon Apr 12 21:16:17 2021 -0300

    empty-list-widget: Use a center box to align the widgetry

 src/gui/gtd-empty-list-widget.ui | 57 ++++++++++++++++++++++++++--------------
 1 file changed, 37 insertions(+), 20 deletions(-)
---
diff --git a/src/gui/gtd-empty-list-widget.ui b/src/gui/gtd-empty-list-widget.ui
index e49041f5..850672e8 100644
--- a/src/gui/gtd-empty-list-widget.ui
+++ b/src/gui/gtd-empty-list-widget.ui
@@ -1,34 +1,51 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <interface>
   <template class="GtdEmptyListWidget" parent="GtkBox">
+    <property name="hexpand">true</property>
+    <property name="vexpand">true</property>
     <property name="margin-top">24</property>
     <property name="margin-bottom">24</property>
     <property name="margin-start">24</property>
     <property name="margin-end">24</property>
     <property name="orientation">vertical</property>
     <property name="spacing">12</property>
+
     <child>
-      <object class="GtkPicture">
-        <property name="vexpand">1</property>
-        <property name="can-shrink">true</property>
-        <property name="keep-aspect-ratio">true</property>
-        <property name="file">resource:///org/gnome/todo/ui/assets/all-done.svg</property>
-      </object>
-    </child>
-    <child>
-      <object class="GtkLabel" id="title_label">
-        <attributes>
-          <attribute name="weight" value="bold"></attribute>
-          <attribute name="scale" value="1.44"></attribute>
-        </attributes>
-      </object>
-    </child>
-    <child>
-      <object class="GtkLabel" id="subtitle_label">
-        <style>
-          <class name="dim-label"/>
-        </style>
+      <object class="GtkCenterBox">
+        <child type="center">
+          <object class="GtkBox">
+            <property name="margin-top">24</property>
+            <property name="margin-bottom">24</property>
+            <property name="margin-start">24</property>
+            <property name="margin-end">24</property>
+            <property name="orientation">vertical</property>
+            <property name="spacing">12</property>
+            <child>
+              <object class="GtkPicture">
+                <property name="can-shrink">true</property>
+                <property name="keep-aspect-ratio">true</property>
+                <property name="file">resource:///org/gnome/todo/ui/assets/all-done.svg</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkLabel" id="title_label">
+                <attributes>
+                  <attribute name="weight" value="bold"></attribute>
+                  <attribute name="scale" value="1.44"></attribute>
+                </attributes>
+              </object>
+            </child>
+            <child>
+              <object class="GtkLabel" id="subtitle_label">
+                <style>
+                  <class name="dim-label"/>
+                </style>
+              </object>
+            </child>
+          </object>
+        </child>
       </object>
     </child>
+
   </template>
 </interface>