Use rounded button in settings sidebar

osu.Game/Graphics/OsuColour.cs

@@ -225,6 +225,11 @@ namespace osu.Game.Graphics
         public readonly Color4 GrayE = Color4Extensions.FromHex(@"eee");
         public readonly Color4 GrayF = Color4Extensions.FromHex(@"fff");
 
+        /// <summary>
+        /// Equivalent to <see cref="OverlayColourProvider.Pink"/>'s <see cref="OverlayColourProvider.Colour3"/>.
+        /// </summary>
+        public readonly Color4 Pink3 = Color4Extensions.FromHex(@"cc3378");
+
         /// <summary>
         /// Equivalent to <see cref="OverlayColourProvider.Blue"/>'s <see cref="OverlayColourProvider.Colour3"/>.
         /// </summary>

osu.Game/Graphics/UserInterfaceV2/RoundedButton.cs

@@ -1,15 +1,17 @@
 // 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.Collections.Generic;
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Effects;
 using osu.Game.Graphics.UserInterface;
 using osuTK;
 
 namespace osu.Game.Graphics.UserInterfaceV2
 {
-    public class RoundedButton : OsuButton
+    public class RoundedButton : OsuButton, IFilterable
     {
         public override float Height
         {
@@ -44,5 +46,14 @@ namespace osu.Game.Graphics.UserInterfaceV2
         }
 
         private void updateCornerRadius() => Content.CornerRadius = DrawHeight / 2;
+
+        public virtual IEnumerable<string> FilterTerms => new[] { Text.ToString() };
+
+        public bool MatchingFilter
+        {
+            set => this.FadeTo(value ? 1 : 0);
+        }
+
+        public bool FilteringActive { get; set; }
     }
 }

osu.Game/Overlays/Settings/DangerousSettingsButton.cs

@@ -14,10 +14,7 @@ namespace osu.Game.Overlays.Settings
         [BackgroundDependencyLoader]
         private void load(OsuColour colours)
         {
-            BackgroundColour = colours.Pink;
+            BackgroundColour = colours.Pink3;
-
-            Triangles.ColourDark = colours.PinkDark;
-            Triangles.ColourLight = colours.PinkLight;
         }
     }
 }

osu.Game/Overlays/Settings/Sections/Input/KeyBindingsSubsection.cs

@@ -7,7 +7,6 @@ using osu.Framework.Allocation;
 using osu.Framework.Extensions.IEnumerableExtensions;
 using osu.Framework.Graphics;
 using osu.Game.Database;
-using osu.Game.Graphics.UserInterface;
 using osu.Game.Input.Bindings;
 using osu.Game.Rulesets;
 using osu.Game.Localisation;
@@ -59,7 +58,7 @@ namespace osu.Game.Overlays.Settings.Sections.Input
         }
     }
 
-    public class ResetButton : DangerousTriangleButton
+    public class ResetButton : DangerousSettingsButton
     {
         [BackgroundDependencyLoader]
         private void load()

osu.Game/Overlays/Settings/Sections/Maintenance/GeneralSettings.cs

@@ -10,7 +10,6 @@ using osu.Framework.Localisation;
 using osu.Game.Beatmaps;
 using osu.Game.Collections;
 using osu.Game.Database;
-using osu.Game.Graphics.UserInterface;
 using osu.Game.Localisation;
 using osu.Game.Scoring;
 using osu.Game.Skinning;
@@ -21,15 +20,15 @@ namespace osu.Game.Overlays.Settings.Sections.Maintenance
     {
         protected override LocalisableString Header => "General";
 
-        private TriangleButton importBeatmapsButton;
+        private SettingsButton importBeatmapsButton;
-        private TriangleButton importScoresButton;
+        private SettingsButton importScoresButton;
-        private TriangleButton importSkinsButton;
+        private SettingsButton importSkinsButton;
-        private TriangleButton importCollectionsButton;
+        private SettingsButton importCollectionsButton;
-        private TriangleButton deleteBeatmapsButton;
+        private SettingsButton deleteBeatmapsButton;
-        private TriangleButton deleteScoresButton;
+        private SettingsButton deleteScoresButton;
-        private TriangleButton deleteSkinsButton;
+        private SettingsButton deleteSkinsButton;
-        private TriangleButton restoreButton;
+        private SettingsButton restoreButton;
-        private TriangleButton undeleteButton;
+        private SettingsButton undeleteButton;
 
         [BackgroundDependencyLoader(permitNulls: true)]
         private void load(BeatmapManager beatmaps, ScoreManager scores, SkinManager skins, [CanBeNull] CollectionManager collectionManager, [CanBeNull] StableImportManager stableImportManager, DialogOverlay dialogOverlay)

osu.Game/Overlays/Settings/SettingsButton.cs

@@ -6,11 +6,11 @@ using System.Linq;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Cursor;
 using osu.Framework.Localisation;
-using osu.Game.Graphics.UserInterface;
+using osu.Game.Graphics.UserInterfaceV2;
 
 namespace osu.Game.Overlays.Settings
 {
-    public class SettingsButton : TriangleButton, IHasTooltip
+    public class SettingsButton : RoundedButton, IHasTooltip
     {
         public SettingsButton()
         {