[Pt Run] Narrator support for result view navigation (#6146)

* Screen reader detecting List view

* Fixed narrator text for listview items and context menu items

* Renamed custom textbox to a more meanigful name

* Renamed custom textbox to a more meanigful name

* Fix formatting of LauncherControl.xaml

* Added support to control multiple elements

src/modules/launcher/PowerLauncher/CustomSearchBox.cs

@@ -0,0 +1,42 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Windows;
+using System.Windows.Automation.Peers;
+using System.Windows.Controls;
+
+namespace PowerLauncher
+{
+    public class CustomSearchBox : TextBox
+    {
+        public List<UIElement> ControlledElements { get; } = new List<UIElement>();
+
+        protected override AutomationPeer OnCreateAutomationPeer()
+        {
+            return new AutoSuggestTextBoxAutomationPeer(this);
+        }
+
+        internal class AutoSuggestTextBoxAutomationPeer : TextBoxAutomationPeer
+        {
+            public AutoSuggestTextBoxAutomationPeer(CustomSearchBox owner)
+                : base(owner)
+            {
+            }
+
+            protected override List<AutomationPeer> GetControlledPeersCore()
+            {
+                var controlledPeers = new List<AutomationPeer>();
+                foreach (UIElement controlledElement in ((CustomSearchBox)Owner).ControlledElements)
+                {
+                    controlledPeers.Add(UIElementAutomationPeer.CreatePeerForElement(controlledElement));
+                }
+
+                return controlledPeers;
+            }
+        }
+    }
+}