Share remove from playlist button design with adjacent download button

osu.Game/Graphics/UserInterface/GrayButton.cs

@@ -0,0 +1,48 @@
+// 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;
+using osu.Framework.Graphics.Shapes;
+using osu.Framework.Graphics.Sprites;
+using osuTK;
+
+namespace osu.Game.Graphics.UserInterface
+{
+    public class GrayButton : OsuAnimatedButton
+    {
+        protected SpriteIcon Icon;
+        protected Box Background;
+
+        private readonly IconUsage icon;
+
+        [Resolved]
+        private OsuColour colours { get; set; }
+
+        public GrayButton(IconUsage icon)
+        {
+            this.icon = icon;
+        }
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            Children = new Drawable[]
+            {
+                Background = new Box
+                {
+                    Colour = colours.Gray4,
+                    RelativeSizeAxes = Axes.Both,
+                    Depth = float.MaxValue
+                },
+                Icon = new SpriteIcon
+                {
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    Size = new Vector2(13),
+                    Icon = icon,
+                },
+            };
+        }
+    }
+}