Bug 595615 — Use proper ellipses

Use ‘…’ instead of ‘...’ in translatable strings.

Closes: https://bugzilla.gnome.org/show_bug.cgi?id=595615

gtk/gtkpagesetupunixdialog.c

@@ -842,7 +842,7 @@ page_name_func (GtkCellLayout   *cell_layout,
       g_object_unref (page_setup);
     }
   else
-    g_object_set (cell, "text",  _("Manage Custom Sizes..."), NULL);
+    g_object_set (cell, "text",  _("Manage Custom Sizes…"), NULL);
 
 }