fdo#82017: Rename 'Close without saving' button to 'Don't Save'.

It matches other applications both in Windows and OS X. Users expect to press
the 'D' key to activate this button. Also, it's shorter.

Change-Id: I08f80fd9dbfbc5e2a5dc69ff2f72d55b80ccda5a
Reviewed-on: https://gerrit.libreoffice.org/10685Reviewed-by: Olivier Hallot <olivier.hallot@edx.srv.br>
Tested-by: Olivier Hallot <olivier.hallot@edx.srv.br>

sfx2/uiconfig/ui/querysavedialog.ui

 <?xml version="1.0" encoding="UTF-8"?>
+<!-- Generated with glade 3.16.1 -->
 <interface>
-  <!-- interface-requires gtk+ 3.0 -->
+  <requires lib="gtk+" version="3.0"/>
   <object class="GtkMessageDialog" id="QuerySaveDialog">
     <property name="can_focus">False</property>
     <property name="border_width">12</property>
@@ -15,14 +16,14 @@
       <object class="GtkBox" id="messagedialog-vbox">
         <property name="can_focus">False</property>
         <property name="orientation">vertical</property>
-        <property name="spacing">24</property>
+        <property name="spacing">12</property>
         <child internal-child="action_area">
           <object class="GtkButtonBox" id="messagedialog-action_area">
             <property name="can_focus">False</property>
             <property name="layout_style">end</property>
             <child>
               <object class="GtkButton" id="discard">
-                <property name="label" translatable="yes">Close _without saving</property>
+                <property name="label" translatable="yes">_Don’t Save</property>
                 <property name="visible">True</property>
                 <property name="can_focus">True</property>
                 <property name="receives_default">True</property>