[gnome-tetravex/arnaudb/wip/gtk4: 42/42] Fix restore_button bug.

[Arnaud B. <arnaudb src gnome org>]

commit 7394de8d3970ae710174fd6f7b994f9b37bd09fb
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Mon Sep 28 15:18:52 2020 +0200

    Fix restore_button bug.
    
    See gtk#3165.

 src/gnome-tetravex.vala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/gnome-tetravex.vala b/src/gnome-tetravex.vala
index 54951a6..2f94e2e 100644
--- a/src/gnome-tetravex.vala
+++ b/src/gnome-tetravex.vala
@@ -367,7 +367,7 @@ private class Tetravex : Gtk.Application
             restore_button.valign = Align.CENTER;
             restore_button.show ();
 
-            restore_button.insert_before (restore_stack, /* insert last */ null);
+            restore_stack.add_child (restore_button);
             restore_stack.set_visible_child (restore_button);
             restore_stack.visible = true;
             headerbar.pack_start (restore_stack);