diff --git a/.github/ISSUE_TEMPLATE/bug_report.md b/.github/ISSUE_TEMPLATE/bug_report.md
index 80716520d9..6b910fc615 100644
--- a/.github/ISSUE_TEMPLATE/bug_report.md
+++ b/.github/ISSUE_TEMPLATE/bug_report.md
@@ -1,8 +1,8 @@
 ---
 name: Bug report
-about: Create a report to help us improve
+about: Create a report to help us improve Avalonia
 title: ''
-labels: ''
+labels: bug
 assignees: ''
 
 ---
diff --git a/.github/ISSUE_TEMPLATE/feature_request.md b/.github/ISSUE_TEMPLATE/feature_request.md
index bbcbbe7d61..11fc491ef1 100644
--- a/.github/ISSUE_TEMPLATE/feature_request.md
+++ b/.github/ISSUE_TEMPLATE/feature_request.md
@@ -2,7 +2,7 @@
 name: Feature request
 about: Suggest an idea for this project
 title: ''
-labels: ''
+labels: enhancement
 assignees: ''
 
 ---
diff --git a/src/Avalonia.Base/Data/IndexerBinding.cs b/src/Avalonia.Base/Data/IndexerBinding.cs
index cc3baa4530..4d07b53dd2 100644
--- a/src/Avalonia.Base/Data/IndexerBinding.cs
+++ b/src/Avalonia.Base/Data/IndexerBinding.cs
@@ -1,6 +1,4 @@
-using System;
-
-namespace Avalonia.Data
+namespace Avalonia.Data
 {
     public class IndexerBinding : IBinding
     {
@@ -24,23 +22,7 @@ namespace Avalonia.Data
             object anchor = null,
             bool enableDataValidation = false)
         {
-            var mode = Mode == BindingMode.Default ?
-                targetProperty.GetMetadata(target.GetType()).DefaultBindingMode :
-                Mode;
-
-            switch (mode)
-            {
-                case BindingMode.OneTime:
-                    return InstancedBinding.OneTime(Source.GetObservable(Property));
-                case BindingMode.OneWay:
-                    return InstancedBinding.OneWay(Source.GetObservable(Property));
-                case BindingMode.OneWayToSource:
-                    return InstancedBinding.OneWayToSource(Source.GetSubject(Property));
-                case BindingMode.TwoWay:
-                    return InstancedBinding.TwoWay(Source.GetSubject(Property));
-                default:
-                    throw new NotSupportedException("Unsupported BindingMode.");
-            }
+            return new InstancedBinding(Source.GetSubject(Property), Mode, BindingPriority.LocalValue);
         }
     }
 }
diff --git a/src/Avalonia.Controls/Primitives/VisualLayerManager.cs b/src/Avalonia.Controls/Primitives/VisualLayerManager.cs
index e5e27c169a..03a84e26f2 100644
--- a/src/Avalonia.Controls/Primitives/VisualLayerManager.cs
+++ b/src/Avalonia.Controls/Primitives/VisualLayerManager.cs
@@ -67,8 +67,6 @@ namespace Avalonia.Controls.Primitives
         {
             get
             {
-                if (IsPopup)
-                    return null;
                 var rv = FindLayer<LightDismissOverlayLayer>();
                 if (rv == null)
                 {
diff --git a/src/Avalonia.Controls/Slider.cs b/src/Avalonia.Controls/Slider.cs
index fe4b24099f..74de33529a 100644
--- a/src/Avalonia.Controls/Slider.cs
+++ b/src/Avalonia.Controls/Slider.cs
@@ -11,7 +11,6 @@ using Avalonia.Utilities;
 
 namespace Avalonia.Controls
 {
-
     /// <summary>
     /// Enum which describes how to position the ticks in a <see cref="Slider"/>.
     /// </summary>
@@ -84,6 +83,9 @@ namespace Avalonia.Controls
         private IDisposable _increaseButtonSubscription;
         private IDisposable _increaseButtonReleaseDispose;
         private IDisposable _pointerMovedDispose;
+        private IDisposable _trackOnKeyDownDispose;
+
+        private const double Tolerance = 0.0001;
 
         /// <summary>
         /// Initializes static members of the <see cref="Slider"/> class. 
@@ -95,7 +97,7 @@ namespace Avalonia.Controls
             Thumb.DragStartedEvent.AddClassHandler<Slider>((x, e) => x.OnThumbDragStarted(e), RoutingStrategies.Bubble);
             Thumb.DragCompletedEvent.AddClassHandler<Slider>((x, e) => x.OnThumbDragCompleted(e),
                 RoutingStrategies.Bubble);
-            
+
             ValueProperty.OverrideMetadata<Slider>(new DirectPropertyMetadata<double>(enableDataValidation: true));
         }
 
@@ -157,13 +159,14 @@ namespace Avalonia.Controls
         protected override void OnApplyTemplate(TemplateAppliedEventArgs e)
         {
             base.OnApplyTemplate(e);
-            
+
             _decreaseButtonPressDispose?.Dispose();
             _decreaseButtonReleaseDispose?.Dispose();
             _increaseButtonSubscription?.Dispose();
             _increaseButtonReleaseDispose?.Dispose();
             _pointerMovedDispose?.Dispose();
-
+            _trackOnKeyDownDispose?.Dispose();
+            
             _decreaseButton = e.NameScope.Find<Button>("PART_DecreaseButton");
             _track = e.NameScope.Find<Track>("PART_Track");
             _increaseButton = e.NameScope.Find<Button>("PART_IncreaseButton");
@@ -171,6 +174,7 @@ namespace Avalonia.Controls
             if (_track != null)
             {
                 _track.IsThumbDragHandled = true;
+                _trackOnKeyDownDispose = _track.AddDisposableHandler(KeyDownEvent, TrackOnKeyDown);
             }
 
             if (_decreaseButton != null)
@@ -188,6 +192,94 @@ namespace Avalonia.Controls
             _pointerMovedDispose = this.AddDisposableHandler(PointerMovedEvent, TrackMoved, RoutingStrategies.Tunnel);
         }
 
+        private void TrackOnKeyDown(object sender, KeyEventArgs e)
+        {
+            if (e.KeyModifiers != KeyModifiers.None) return;
+
+            switch (e.Key)
+            {
+                case Key.Left:
+                    MoveToNextTick(-SmallChange);
+                    break;
+
+                case Key.Right:
+                    MoveToNextTick(SmallChange);
+                    break;
+
+                case Key.PageUp:
+                    MoveToNextTick(-LargeChange);
+                    break;
+
+                case Key.PageDown:
+                    MoveToNextTick(LargeChange);
+                    break;
+
+                case Key.Home:
+                    Value = Minimum;
+                    break;
+
+                case Key.End:
+                    Value = Maximum;
+                    break;
+            }
+        }
+            
+        private void MoveToNextTick(double direction)
+        {
+            if (direction == 0.0) return;
+
+            var value = Value;
+
+            // Find the next value by snapping
+            var next = SnapToTick(Math.Max(Minimum, Math.Min(Maximum, value + direction)));
+
+            var greaterThan = direction > 0; //search for the next tick greater than value?
+
+            // If the snapping brought us back to value, find the next tick point
+            if (Math.Abs(next - value) < Tolerance
+                && !(greaterThan && Math.Abs(value - Maximum) < Tolerance) // Stop if searching up if already at Max
+                && !(!greaterThan && Math.Abs(value - Minimum) < Tolerance)) // Stop if searching down if already at Min
+            {
+                var ticks = Ticks;
+
+                // If ticks collection is available, use it.
+                // Note that ticks may be unsorted.
+                if (ticks != null && ticks.Count > 0)
+                {
+                    foreach (var tick in ticks)
+                    {
+                        // Find the smallest tick greater than value or the largest tick less than value
+                        if (greaterThan && MathUtilities.GreaterThan(tick, value) &&
+                            (MathUtilities.LessThan(tick, next) || Math.Abs(next - value) < Tolerance)
+                            || !greaterThan && MathUtilities.LessThan(tick, value) &&
+                            (MathUtilities.GreaterThan(tick, next) || Math.Abs(next - value) < Tolerance))
+                        {
+                            next = tick;
+                        }
+                    }
+                }
+                else if (MathUtilities.GreaterThan(TickFrequency, 0.0))
+                {
+                    // Find the current tick we are at
+                    var tickNumber = Math.Round((value - Minimum) / TickFrequency);
+
+                    if (greaterThan)
+                        tickNumber += 1.0;
+                    else
+                        tickNumber -= 1.0;
+
+                    next = Minimum + tickNumber * TickFrequency;
+                }
+            }
+
+
+            // Update if we've found a better value
+            if (Math.Abs(next - value) > Tolerance)
+            {
+                Value = next;
+            }
+        }
+
         private void TrackMoved(object sender, PointerEventArgs e)
         {
             if (_isDragging)
@@ -272,19 +364,18 @@ namespace Avalonia.Controls
         {
             if (IsSnapToTickEnabled)
             {
-                double previous = Minimum;
-                double next = Maximum;
+                var previous = Minimum;
+                var next = Maximum;
 
                 // This property is rarely set so let's try to avoid the GetValue
                 var ticks = Ticks;
 
                 // If ticks collection is available, use it.
                 // Note that ticks may be unsorted.
-                if ((ticks != null) && (ticks.Count > 0))
+                if (ticks != null && ticks.Count > 0)
                 {
-                    for (int i = 0; i < ticks.Count; i++)
+                    foreach (var tick in ticks)
                     {
-                        double tick = ticks[i];
                         if (MathUtilities.AreClose(tick, value))
                         {
                             return value;
@@ -302,7 +393,7 @@ namespace Avalonia.Controls
                 }
                 else if (MathUtilities.GreaterThan(TickFrequency, 0.0))
                 {
-                    previous = Minimum + (Math.Round(((value - Minimum) / TickFrequency)) * TickFrequency);
+                    previous = Minimum + Math.Round((value - Minimum) / TickFrequency) * TickFrequency;
                     next = Math.Min(Maximum, previous + TickFrequency);
                 }
 
diff --git a/src/Avalonia.Controls/ToolTipService.cs b/src/Avalonia.Controls/ToolTipService.cs
index 9e0bf60f42..f6458c2112 100644
--- a/src/Avalonia.Controls/ToolTipService.cs
+++ b/src/Avalonia.Controls/ToolTipService.cs
@@ -38,9 +38,16 @@ namespace Avalonia.Controls
 
             if (ToolTip.GetIsOpen(control) && e.NewValue != e.OldValue && !(e.NewValue is ToolTip))
             {
-                var tip = control.GetValue(ToolTip.ToolTipProperty);
-
-                tip.Content = e.NewValue;
+                if (e.NewValue is null)
+                {
+                    Close(control);
+                }
+                else
+                {
+                    var tip = control.GetValue(ToolTip.ToolTipProperty);
+
+                    tip.Content = e.NewValue;
+                }
             }
         }
 
diff --git a/src/Avalonia.Themes.Default/MenuItem.xaml b/src/Avalonia.Themes.Default/MenuItem.xaml
index 741cf1b79c..9ce19cff6e 100644
--- a/src/Avalonia.Themes.Default/MenuItem.xaml
+++ b/src/Avalonia.Themes.Default/MenuItem.xaml
@@ -60,6 +60,7 @@
             <Popup Name="PART_Popup"
                    PlacementMode="Right"
                    IsLightDismissEnabled="True"
+                   OverlayInputPassThroughElement="{Binding $parent[MenuItem]}"
                    IsOpen="{TemplateBinding IsSubMenuOpen, Mode=TwoWay}">
               <Border Background="{TemplateBinding Background}"
                       BorderBrush="{DynamicResource ThemeBorderMidBrush}"
diff --git a/src/Avalonia.Themes.Fluent/Controls/CheckBox.xaml b/src/Avalonia.Themes.Fluent/Controls/CheckBox.xaml
index 83d2779872..9261a82168 100644
--- a/src/Avalonia.Themes.Fluent/Controls/CheckBox.xaml
+++ b/src/Avalonia.Themes.Fluent/Controls/CheckBox.xaml
@@ -11,7 +11,6 @@
     <Setter Property="HorizontalContentAlignment" Value="Left" />
     <Setter Property="VerticalContentAlignment" Value="Center" />    
     <Setter Property="FontSize" Value="{DynamicResource ControlContentThemeFontSize}" />
-    <Setter Property="MinWidth" Value="120" />
     <Setter Property="MinHeight" Value="32" />
     <!--<Setter Property="UseSystemFocusVisuals" Value="{StaticResource UseSystemFocusVisuals}" />
     <Setter Property="FocusVisualMargin" Value="-7,-3,-7,-3" />-->
diff --git a/src/Avalonia.Themes.Fluent/Controls/MenuItem.xaml b/src/Avalonia.Themes.Fluent/Controls/MenuItem.xaml
index 39683b837c..4950043a99 100644
--- a/src/Avalonia.Themes.Fluent/Controls/MenuItem.xaml
+++ b/src/Avalonia.Themes.Fluent/Controls/MenuItem.xaml
@@ -112,6 +112,7 @@
           <Popup Name="PART_Popup"
                  WindowManagerAddShadowHint="False"
                  PlacementMode="Right"
+                 OverlayInputPassThroughElement="{Binding $parent[MenuItem]}"
                  HorizontalOffset="{DynamicResource MenuFlyoutSubItemPopupHorizontalOffset}"
                  IsLightDismissEnabled="True"
                  IsOpen="{TemplateBinding IsSubMenuOpen, Mode=TwoWay}">
diff --git a/src/Avalonia.Themes.Fluent/Controls/RadioButton.xaml b/src/Avalonia.Themes.Fluent/Controls/RadioButton.xaml
index 2847d1fa5a..35274b9cf3 100644
--- a/src/Avalonia.Themes.Fluent/Controls/RadioButton.xaml
+++ b/src/Avalonia.Themes.Fluent/Controls/RadioButton.xaml
@@ -19,7 +19,6 @@
     <Setter Property="HorizontalContentAlignment" Value="Left" />
     <Setter Property="VerticalContentAlignment" Value="Center" />    
     <Setter Property="FontSize" Value="{DynamicResource ControlContentThemeFontSize}" />
-    <Setter Property="MinWidth" Value="120" />
     <Setter Property="Template">
       <ControlTemplate TargetType="RadioButton">
         <Border Name="RootBorder"
diff --git a/src/Avalonia.X11/X11Atoms.cs b/src/Avalonia.X11/X11Atoms.cs
index 137757b9cf..b59883ef94 100644
--- a/src/Avalonia.X11/X11Atoms.cs
+++ b/src/Avalonia.X11/X11Atoms.cs
@@ -114,7 +114,7 @@ namespace Avalonia.X11
         public readonly IntPtr XA_WM_CLASS = (IntPtr)67;
         public readonly IntPtr XA_WM_TRANSIENT_FOR = (IntPtr)68;
 
-        public readonly IntPtr RR_PROPERTY_RANDR_EDID = (IntPtr)82;
+        public readonly IntPtr EDID;
 
         public readonly IntPtr WM_PROTOCOLS;
         public readonly IntPtr WM_DELETE_WINDOW;
diff --git a/src/Avalonia.X11/X11Screens.cs b/src/Avalonia.X11/X11Screens.cs
index 2900c9edb6..bf5c74e0e5 100644
--- a/src/Avalonia.X11/X11Screens.cs
+++ b/src/Avalonia.X11/X11Screens.cs
@@ -91,12 +91,12 @@ namespace Avalonia.X11
                 var hasEDID = false;
                 for(var pc = 0; pc < propertyCount; pc++)
                 {
-                    if(properties[pc] == _x11.Atoms.RR_PROPERTY_RANDR_EDID)
+                    if(properties[pc] == _x11.Atoms.EDID)
                         hasEDID = true;
                 }
                 if(!hasEDID)
                     return null;
-                XRRGetOutputProperty(_x11.Display, rrOutput, _x11.Atoms.RR_PROPERTY_RANDR_EDID, 0, EDIDStructureLength, false, false, _x11.Atoms.AnyPropertyType, out IntPtr actualType, out int actualFormat, out int bytesAfter, out _, out IntPtr prop);
+                XRRGetOutputProperty(_x11.Display, rrOutput, _x11.Atoms.EDID, 0, EDIDStructureLength, false, false, _x11.Atoms.AnyPropertyType, out IntPtr actualType, out int actualFormat, out int bytesAfter, out _, out IntPtr prop);
                 if(actualType != _x11.Atoms.XA_INTEGER)
                     return null;
                 if(actualFormat != 8) // Expecting an byte array
diff --git a/tests/Avalonia.Controls.UnitTests/ToolTipTests.cs b/tests/Avalonia.Controls.UnitTests/ToolTipTests.cs
index 9279e78013..25969a58e3 100644
--- a/tests/Avalonia.Controls.UnitTests/ToolTipTests.cs
+++ b/tests/Avalonia.Controls.UnitTests/ToolTipTests.cs
@@ -270,6 +270,34 @@ namespace Avalonia.Controls.UnitTests
                 Assert.Empty(toolTip.Classes);
             }
         }
+
+        [Fact]
+        public void Should_Close_On_Null_Tip()
+        {
+            using (UnitTestApplication.Start(TestServices.StyledWindow))
+            {
+                var window = new Window();
+
+                var target = new Decorator()
+                {
+                    [ToolTip.TipProperty] = "Tip",
+                    [ToolTip.ShowDelayProperty] = 0
+                };
+
+                window.Content = target;
+
+                window.ApplyTemplate();
+                window.Presenter.ApplyTemplate();
+
+                _mouseHelper.Enter(target);
+
+                Assert.True(ToolTip.GetIsOpen(target));
+
+                target[ToolTip.TipProperty] = null;
+
+                Assert.False(ToolTip.GetIsOpen(target));
+            }
+        }
     }
 
     internal class ToolTipViewModel