tdf#122360 Decrease size of spinbutton for copy count

Explicitly set vertical alignment to "centre" rather than the
default "fill" which caused the spinbutton to fill the same vertical
space as the neighbouring GtkBox holding the collate settings,
making it appear to large.

Change-Id: I04818d59cf8babe424d96d0c9ef322fac9ef756a
Reviewed-on: https://gerrit.libreoffice.org/65694Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
Tested-by: Noel Grandin <noel.grandin@collabora.co.uk>

vcl/uiconfig/ui/printdialog.ui

 <?xml version="1.0" encoding="UTF-8"?>
-<!-- Generated with glade 3.20.4 -->
+<!-- Generated with glade 3.22.1 -->
 <interface domain="vcl">
   <requires lib="gtk+" version="3.18"/>
   <requires lib="LibreOffice" version="1.0"/>
@@ -125,6 +125,9 @@
     <property name="can_focus">False</property>
     <property name="border_width">6</property>
     <property name="type_hint">dialog</property>
+    <child>
+      <placeholder/>
+    </child>
     <child internal-child="vbox">
       <object class="GtkBox" id="PrintDialogBox">
         <property name="can_focus">False</property>
@@ -537,6 +540,7 @@
                                           <object class="GtkSpinButton" id="copycount">
                                             <property name="visible">True</property>
                                             <property name="can_focus">True</property>
+                                            <property name="valign">center</property>
                                             <property name="adjustment">adjustment2</property>
                                           </object>
                                           <packing>
@@ -1147,8 +1151,5 @@
         </child>
       </object>
     </child>
-    <child>
-      <placeholder/>
-    </child>
   </object>
 </interface>