[gnome-tetravex/arnaudb/wip/gtk4: 40/60] Adapt to Box API.

[Arnaud B. <arnaudb src gnome org>]

commit 09587e7ab125f7c7bee1c696f16b7cdd54d24493
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Fri Feb 21 03:58:03 2020 +0100

    Adapt to Box API.

 src/gnome-tetravex.vala | 4 ++--
 src/score-dialog.vala   | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/src/gnome-tetravex.vala b/src/gnome-tetravex.vala
index a3aa503..9ce271e 100644
--- a/src/gnome-tetravex.vala
+++ b/src/gnome-tetravex.vala
@@ -350,8 +350,8 @@ private class Tetravex : Gtk.Application
 
         Box undo_redo_box = new Box (Orientation.HORIZONTAL, /* spacing */ 0);
         undo_redo_box.get_style_context ().add_class ("linked");
-        undo_redo_box.pack_start (undo_button);
-        undo_redo_box.pack_start (redo_button);
+        undo_redo_box.add (undo_button);
+        undo_redo_box.add (redo_button);
         undo_redo_box.show ();
 
         if (can_restore && !restore_on_start)
diff --git a/src/score-dialog.vala b/src/score-dialog.vala
index 2b3b98f..2b153e9 100644
--- a/src/score-dialog.vala
+++ b/src/score-dialog.vala
@@ -61,7 +61,7 @@ private class ScoreDialog : Dialog
         scroll.show ();
 
         Box content_area = get_content_area ();
-        content_area.pack_start (scroll, true, true, 0);
+        content_area.add (scroll);
 
         score_model = new Gtk.ListStore (3, typeof (string), typeof (string), typeof (int));