[New Utility]Mouse Without Borders

* Integrate Mouse Without Borders into PowerToys

---------

Co-authored-by: Jaime Bernardo <jaime@janeasystems.com>

src/settings-ui/Settings.UI/Helpers/IndexedObservableCollection.cs

@@ -0,0 +1,58 @@
+// 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.Collections.ObjectModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Microsoft.PowerToys.Settings.UI.Helpers
+{
+#pragma warning disable SA1649 // File name should match first type name
+    public class IndexedItem<T>
+#pragma warning restore SA1649 // File name should match first type name
+    {
+        public T Item { get; set; }
+
+        public int Index { get; set; }
+
+        public IndexedItem(T item, int index)
+        {
+            Item = item;
+            Index = index;
+        }
+    }
+
+#pragma warning disable SA1402 // File may only contain a single type
+    public class IndexedObservableCollection<T> : ObservableCollection<IndexedItem<T>>
+#pragma warning restore SA1402 // File may only contain a single type
+    {
+        public IndexedObservableCollection(IEnumerable<T> items)
+        {
+            int index = 0;
+            foreach (var item in items)
+            {
+                Add(new IndexedItem<T>(item, index++));
+            }
+        }
+
+        public IEnumerable<T> ToEnumerable()
+        {
+            return this.Select(x => x.Item);
+        }
+
+        public void Swap(int index1, int index2)
+        {
+            var temp = this[index1];
+            this[index1] = this[index2];
+            this[index2] = temp;
+
+            // Update the original index of the items
+            this[index1].Index = index1;
+            this[index2].Index = index2;
+        }
+    }
+}