Merge pull request #21718 from bdach/fix-welcome-screen-buttons

Fix welcome screen language buttons not working

osu.Game/Graphics/Containers/OsuClickableContainer.cs

@@ -1,6 +1,7 @@
 // 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 System;
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
@@ -46,5 +47,8 @@ namespace osu.Game.Graphics.Containers
             AddInternal(content);
             Add(CreateHoverSounds(sampleSet));
         }
+
+        protected override void ClearInternal(bool disposeChildren = true) =>
+            throw new InvalidOperationException($"Clearing {nameof(InternalChildren)} will cause critical failure. Use {nameof(Clear)} instead.");
     }
 }

osu.Game/Overlays/FirstRunSetup/ScreenWelcome.cs

@@ -147,7 +147,7 @@ namespace osu.Game.Overlays.FirstRunSetup
                 [BackgroundDependencyLoader]
                 private void load()
                 {
-                    InternalChildren = new Drawable[]
+                    AddRange(new Drawable[]
                     {
                         backgroundBox = new Box
                         {
@@ -162,7 +162,7 @@ namespace osu.Game.Overlays.FirstRunSetup
                             Colour = colourProvider.Light1,
                             Text = Language.GetDescription(),
                         }
-                    };
+                    });
                 }
 
                 protected override void LoadComplete()