Add back explicit binds.

osu.Desktop.VisualTests/Tests/TestCaseHitObjects.cs

@@ -99,6 +99,7 @@ namespace osu.Desktop.VisualTests.Tests
 
             AddToggleStep(@"auto", state => { auto = state; load(mode); });
 
+            BasicSliderBar<double> sliderBar;
             Add(new Container
             {
                 Anchor = Anchor.TopRight,
@@ -107,16 +108,17 @@ namespace osu.Desktop.VisualTests.Tests
                 Children = new Drawable[]
                 {
                     new SpriteText { Text = "Playback Speed" },
-                    new BasicSliderBar<double>
+                    sliderBar = new BasicSliderBar<double>
                     {
                         Width = 150,
                         Height = 10,
                         SelectionColor = Color4.Orange,
-                        Current = playbackSpeed
                     }
                 }
             });
 
+            sliderBar.Current.BindTo(playbackSpeed);
+
             framedClock.ProcessFrame();
 
             var clockAdjustContainer = new Container

osu.Desktop.VisualTests/Tests/TestCaseKeyCounter.cs

@@ -44,6 +44,8 @@ namespace osu.Desktop.VisualTests.Tests
                 kc.Add(new KeyCounterKeyboard(key));
             });
 
+            TestSliderBar<int> sliderBar;
+
             Add(new Container
             {
                 Anchor = Anchor.TopRight,
@@ -52,16 +54,17 @@ namespace osu.Desktop.VisualTests.Tests
                 Children = new Drawable[]
                 {
                     new SpriteText { Text = "FadeTime" },
-                    new TestSliderBar<int>
+                    sliderBar =new TestSliderBar<int>
                     {
                         Width = 150,
                         Height = 10,
                         SelectionColor = Color4.Orange,
-                        Current = bindable
                     }
                 }
             });
 
+            sliderBar.Current.BindTo(bindable);
+
             Add(kc);
         }
         private class TestSliderBar<T> : SliderBar<T> where T : struct

osu.Game/Graphics/UserInterface/Nub.cs

@@ -92,12 +92,6 @@ namespace osu.Game.Graphics.UserInterface
             }
         }
 
-        private readonly Bindable<bool> current = new Bindable<bool>();
+        public Bindable<bool> Current { get; } = new Bindable<bool>();
-
-        public Bindable<bool> Current
-        {
-            get { return current; }
-            set { current.BindTo(value); }
-        }
     }
 }

osu.Game/Graphics/UserInterface/OsuCheckbox.cs

@@ -24,7 +24,7 @@ namespace osu.Game.Graphics.UserInterface
             set
             {
                 bindable = value;
-                Current = bindable;
+                Current.BindTo(bindable);
                 if (value?.Disabled ?? true)
                     Alpha = 0.3f;
             }
@@ -69,13 +69,14 @@ namespace osu.Game.Graphics.UserInterface
                 labelSpriteText = new OsuSpriteText(),
                 nub = new Nub
                 {
-                    Current = Current,
                     Anchor = Anchor.CentreRight,
                     Origin = Anchor.CentreRight,
                     Margin = new MarginPadding { Right = 5 },
                 }
             };
 
+            nub.Current.BindTo(Current);
+
             Current.ValueChanged += newValue =>
             {
                 if (newValue)

osu.Game/Overlays/Options/OptionDropdown.cs

@@ -33,7 +33,7 @@ namespace osu.Game.Overlays.Options
             set
             {
                 bindable = value;
-                dropdown.Current = bindable;
+                dropdown.Current.BindTo(bindable);
                 if (value?.Disabled ?? true)
                     Alpha = 0.3f;
             }

osu.Game/Overlays/Options/OptionSlider.cs

@@ -34,7 +34,7 @@ namespace osu.Game.Overlays.Options
             set
             {
                 bindable = value;
-                slider.Current = bindable;
+                slider.Current.BindTo(bindable);
                 if (value?.Disabled ?? true)
                     Alpha = 0.3f;
             }

osu.Game/Overlays/Options/OptionTextBox.cs

@@ -15,7 +15,7 @@ namespace osu.Game.Overlays.Options
             set
             {
                 bindable = value;
-                Current = bindable;
+                Current.BindTo(bindable);
                 if (value?.Disabled ?? true)
                     Alpha = 0.3f;
             }