Fixed Task not completing issue when offset is negative

Author: Vijay-Nirmal

Microsoft.Toolkit.Uwp.UI/Extensions/ListViewBase/ListViewExtensions.SmoothScrollIntoView.cs

@@ -201,8 +201,23 @@ public static async Task SmoothScrollIntoViewWithItemAsync(this ListViewBase lis
         /// <param name="disableAnimation">if set to <c>true</c> disable animation.</param>
         private static async Task ChangeViewAsync(this ScrollViewer scrollViewer, double? horizontalOffset, double? verticalOffset, float? zoomFactor, bool disableAnimation)
         {
-            horizontalOffset = horizontalOffset > scrollViewer.ScrollableWidth ? scrollViewer.ScrollableWidth : horizontalOffset;
-            verticalOffset = verticalOffset > scrollViewer.ScrollableHeight ? scrollViewer.ScrollableHeight : verticalOffset;
+            if (horizontalOffset > scrollViewer.ScrollableWidth)
+            {
+                horizontalOffset = scrollViewer.ScrollableWidth;
+            }
+            else if (horizontalOffset < 0)
+            {
+                horizontalOffset = 0;
+            }
+
+            if (verticalOffset > scrollViewer.ScrollableHeight)
+            {
+                verticalOffset = scrollViewer.ScrollableHeight;
+            }
+            else if (verticalOffset < 0)
+            {
+                verticalOffset = 0;
+            }
 
             // MUST check this and return immediately, otherwise this async task will never complete because ViewChanged event won't get triggered
             if (horizontalOffset == scrollViewer.HorizontalOffset && verticalOffset == scrollViewer.VerticalOffset)