[seahorse] gkr: use header bar when adding keyring.

[Niels De Graef <nielsdg src gnome org>]

commit 726a5c06d4a4ae6f467b9d633837979fc1bf1c50
Author: Niels De Graef <nielsdegraef gmail com>
Date:   Sat Aug 11 10:26:25 2018 +0200

    gkr: use header bar when adding keyring.

 gkr/gkr-keyring-add.vala | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/gkr/gkr-keyring-add.vala b/gkr/gkr-keyring-add.vala
index cc5f8167..aaf55622 100644
--- a/gkr/gkr-keyring-add.vala
+++ b/gkr/gkr-keyring-add.vala
@@ -27,7 +27,10 @@ public class Seahorse.Gkr.KeyringAdd : Gtk.Dialog {
     }
 
     public KeyringAdd(Gtk.Window? parent) {
-        GLib.Object(transient_for: parent);
+        GLib.Object(
+            transient_for: parent,
+            use_header_bar: 1
+        );
         show();
         present();
     }