Refactored the Visual/Logical tree extensions

Author: Sergio0694

Microsoft.Toolkit.Uwp.UI.Controls.Core/InAppNotification/InAppNotification.cs

@@ -77,7 +77,7 @@ protected override void OnApplyTemplate()
                 VisualStateManager.GoToState(this, StateContentVisible, true);
             }
 
-            AutomationProperties.SetLabeledBy(this, VisualTree.FindDescendant<ContentPresenter>(this));
+            AutomationProperties.SetLabeledBy(this, this.FindDescendant<ContentPresenter>());
         }
 
         /// <summary>

Microsoft.Toolkit.Uwp.UI.Controls.Markdown/Render/MarkdownRenderer.cs

@@ -214,7 +214,7 @@ private void Preventative_PointerWheelChanged(object sender, Windows.UI.Xaml.Inp
                 return;
             }
 
-            var rootViewer = VisualTree.FindAscendant<ScrollViewer>(RootElement);
+            var rootViewer = RootElement.FindAscendant<ScrollViewer>();
             if (rootViewer != null)
             {
                 pointerWheelChanged?.Invoke(rootViewer, new object[] { e });

Microsoft.Toolkit.Uwp.UI/Extensions/Tree/VisualTree.cs renamed to Microsoft.Toolkit.Uwp.UI/Extensions/DependencyObjectExtensions.cs

@@ -10,12 +10,12 @@
 
 #nullable enable
 
-namespace Microsoft.Toolkit.Uwp.UI.Extensions
+namespace Microsoft.Toolkit.Uwp.UI
 {
     /// <summary>
-    /// Defines a collection of extensions methods for UI.
+    /// Provides attached dependency properties for the <see cref="DependencyObject"/> type.
     /// </summary>
-    public static class VisualTree
+    public static class DependencyObjectExtensions
     {
         /// <summary>
         /// Find the first descendant of type <see cref="FrameworkElement"/> with a given name, using a depth-first search.

Microsoft.Toolkit.Uwp.UI/Extensions/Tree/LogicalTree.cs renamed to Microsoft.Toolkit.Uwp.UI/Extensions/FrameworkElement/FrameworkElementExtensions.LogicalTree.cs

@@ -12,12 +12,10 @@
 
 #nullable enable
 
-namespace Microsoft.Toolkit.Uwp.UI.Extensions
+namespace Microsoft.Toolkit.Uwp.UI
 {
-    /// <summary>
-    /// Defines a collection of extensions methods for UI.
-    /// </summary>
-    public static class LogicalTree
+    /// <inheritdoc cref="FrameworkElementExtensions"/>
+    public static partial class FrameworkElementExtensions
     {
         /// <summary>
         /// Find the first child of type <see cref="FrameworkElement"/> with a given name, using a depth-first search.