[balsa/gtk3] Use header bar in MDN dialog

[Peter Bloomfield <peterb src gnome org>]

commit 1c6ef2def99dab6b04ebfcd6727b095b7d1e6548
Author: Peter Bloomfield <PeterBloomfield bellsouth net>
Date:   Tue Mar 24 22:53:35 2015 -0400

    Use header bar in MDN dialog
    
        * src/balsa-message.c: use header bar in dialog.

 ChangeLog           |    6 ++++++
 src/balsa-message.c |    3 ++-
 2 files changed, 8 insertions(+), 1 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index 728fb4c..e4fe063 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -2,6 +2,12 @@
 
        Use header bar
 
+       * src/balsa-message.c: use header bar in dialog.
+
+2015-03-24  Peter Bloomfield  <pbloomfield bellsouth net>
+
+       Use header bar
+
        * src/balsa-mblist.c (bmbl_mru_show_tree): use header bar in
        dialog.
 
diff --git a/src/balsa-message.c b/src/balsa-message.c
index 7b9bdb6..0ca856f 100644
--- a/src/balsa-message.c
+++ b/src/balsa-message.c
@@ -2620,7 +2620,8 @@ create_mdn_dialog(GtkWindow *parent, gchar * sender, gchar * mdn_to_address,
 
     mdn_dialog =
         gtk_message_dialog_new(parent,
-                               GTK_DIALOG_DESTROY_WITH_PARENT,
+                               GTK_DIALOG_DESTROY_WITH_PARENT |
+                               GTK_DIALOG_USE_HEADER_BAR,
                                GTK_MESSAGE_QUESTION,
                                GTK_BUTTONS_YES_NO,
                                _("The sender of this mail, %s, "