Move setting to new "mods" section

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

@@ -38,11 +38,6 @@ namespace osu.Game.Overlays.Settings.Sections.Gameplay
                     LabelText = "Always show key overlay",
                     Bindable = config.GetBindable<bool>(OsuSetting.KeyOverlay)
                 },
-                new SettingsCheckbox
-                {
-                    LabelText = "Increase visibility of first object with \"Hidden\" mod",
-                    Bindable = config.GetBindable<bool>(OsuSetting.IncreaseFirstObjectVisibility)
-                },
             };
         }
     }

osu.Game/Overlays/Settings/Sections/Gameplay/ModsSettings.cs

@@ -0,0 +1,26 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using osu.Framework.Allocation;
+using osu.Game.Configuration;
+
+namespace osu.Game.Overlays.Settings.Sections.Gameplay
+{
+    public class ModsSettings : SettingsSubsection
+    {
+        protected override string Header => "Mods";
+
+        [BackgroundDependencyLoader]
+        private void load(OsuConfigManager config)
+        {
+            Children = new[]
+            {
+                new SettingsCheckbox
+                {
+                    LabelText = "Increase visibility of first object with \"Hidden\" mod",
+                    Bindable = config.GetBindable<bool>(OsuSetting.IncreaseFirstObjectVisibility)
+                },
+            };
+        }
+    }
+}

osu.Game/Overlays/Settings/Sections/GameplaySection.cs

@@ -21,7 +21,8 @@ namespace osu.Game.Overlays.Settings.Sections
             {
                 new GeneralSettings(),
                 new SongSelectSettings(),
-                new ScrollingSettings()
+                new ScrollingSettings(),
+                new ModsSettings(),
             };
         }