[gnome-taquin/arnaudb/wip/gtk4: 35/56] Fix HistoryButton popover.

[Arnaud B. <arnaudb src gnome org>]

commit dc9a4b6a0ca62cf8b1b50b2d1df7812c31b9b5e8
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Sat Apr 18 17:46:50 2020 +0200

    Fix HistoryButton popover.

 src/history-button.vala | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/src/history-button.vala b/src/history-button.vala
index 170cd2d..ec7c5e0 100644
--- a/src/history-button.vala
+++ b/src/history-button.vala
@@ -28,6 +28,9 @@ private class HistoryButton : ToggleButton
 
     construct
     {
+        BinLayout layout = new BinLayout ();
+        set_layout_manager (layout);
+
         update_state (/* label */ "0", /* sensitive */ false);
         generate_moves_menu ();
     }