deploy cunning hack to center arrow block

Change-Id: I372e373844169f216fb856107cc10b063d99e31d

sw/uiconfig/swriter/ui/mmpreparepage.ui

@@ -193,6 +193,22 @@
                             <property name="height">1</property>
                           </packing>
                         </child>
+                        <child>
+                          <object class="GtkBox" id="box1">
+                            <property name="visible">True</property>
+                            <property name="can_focus">False</property>
+                            <property name="orientation">vertical</property>
+                            <child>
+                              <placeholder/>
+                            </child>
+                          </object>
+                          <packing>
+                            <property name="left_attach">2</property>
+                            <property name="top_attach">0</property>
+                            <property name="width">1</property>
+                            <property name="height">1</property>
+                          </packing>
+                        </child>
                       </object>
                       <packing>
                         <property name="left_attach">0</property>
@@ -325,4 +341,10 @@ Clicking 'Edit Document...' will temporarily reduce the wizard to a small window
       </packing>
     </child>
   </object>
+  <object class="GtkSizeGroup" id="sizegroup1">
+    <widgets>
+      <widget name="label4"/>
+      <widget name="box1"/>
+    </widgets>
+  </object>
 </interface>