Add toolbar button

osu.Game/Overlays/Toolbar/ToolbarChangelogButton.cs

@@ -0,0 +1,22 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Allocation;
+using osu.Framework.Graphics.Sprites;
+
+namespace osu.Game.Overlays.Toolbar
+{
+    public class ToolbarChangelogButton : ToolbarOverlayToggleButton
+    {
+        public ToolbarChangelogButton()
+        {
+            SetIcon(FontAwesome.Solid.Bullhorn);
+        }
+
+        [BackgroundDependencyLoader(true)]
+        private void load(ChangelogOverlay changelog)
+        {
+            StateContainer = changelog;
+        }
+    }
+}