Add the ability to add new ControlPoint types to existing groups

osu.Game/Screens/Edit/Timing/SampleSection.cs

@@ -0,0 +1,44 @@
+using osu.Framework.Allocation;
+using osu.Game.Beatmaps.ControlPoints;
+using osu.Game.Graphics.Sprites;
+
+namespace osu.Game.Screens.Edit.Timing
+{
+    internal class SampleSection : Section<SampleControlPoint>
+    {
+        private OsuSpriteText bank;
+        private OsuSpriteText volume;
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            Flow.AddRange(new[]
+            {
+                bank = new OsuSpriteText(),
+                volume = new OsuSpriteText(),
+            });
+        }
+
+        protected override SampleControlPoint CreatePoint()
+        {
+            var reference = Beatmap.Value.Beatmap.ControlPointInfo.SamplePointAt(SelectedGroup.Value.Time);
+
+            return new SampleControlPoint
+            {
+                SampleBank = reference.SampleBank,
+                SampleVolume = reference.SampleVolume,
+            };
+        }
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+
+            ControlPoint.BindValueChanged(point =>
+            {
+                bank.Text = $"Bank: {point.NewValue?.SampleBank}";
+                volume.Text = $"Volume: {point.NewValue?.SampleVolume}";
+            });
+        }
+    }
+}