Allow arbitrary height catch editor

Useful because can see more notes at once.

osu.Game.Rulesets.Catch/Edit/CatchEditorPlayfieldAdjustmentContainer.cs

@@ -0,0 +1,49 @@
+// 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.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Game.Rulesets.Catch.UI;
+using osu.Game.Rulesets.UI;
+using osuTK;
+
+namespace osu.Game.Rulesets.Catch.Edit
+{
+    public class CatchEditorPlayfieldAdjustmentContainer : PlayfieldAdjustmentContainer
+    {
+        protected override Container<Drawable> Content => content;
+        private readonly Container content;
+
+        public CatchEditorPlayfieldAdjustmentContainer()
+        {
+            Anchor = Anchor.TopCentre;
+            Origin = Anchor.TopCentre;
+            Size = new Vector2(0.8f, 0.9f);
+
+            InternalChild = new ScalingContainer
+            {
+                Anchor = Anchor.TopCentre,
+                Origin = Anchor.TopCentre,
+                Child = content = new Container { RelativeSizeAxes = Axes.Both },
+            };
+        }
+
+        private class ScalingContainer : Container
+        {
+            public ScalingContainer()
+            {
+                RelativeSizeAxes = Axes.Y;
+                Width = CatchPlayfield.WIDTH;
+            }
+
+            protected override void Update()
+            {
+                base.Update();
+
+                Scale = new Vector2(Math.Min(Parent.ChildSize.X / CatchPlayfield.WIDTH, Parent.ChildSize.Y / CatchPlayfield.HEIGHT));
+                Height = 1 / Scale.Y;
+            }
+        }
+    }
+}