Highlight folders when an item is dragged over it. (#1375)

Author: ChihweiLHBird

Files/BaseLayout.cs

@@ -439,6 +439,7 @@ protected virtual void Page_CharacterReceived(CoreWindow sender, CharacterReceiv
 
         protected async void List_DragOver(object sender, DragEventArgs e)
         {
+            ClearSelection();
             if (e.DataView.Contains(StandardDataFormats.StorageItems))
             {
                 IReadOnlyList<IStorageItem> draggedItems = await e.DataView.GetStorageItemsAsync();
@@ -488,6 +489,8 @@ protected async void Item_DragStarting(object sender, DragStartingEventArgs e)
         protected async void Item_DragOver(object sender, DragEventArgs e)
         {
             ListedItem item = GetItemFromElement(sender);
+            SetSelectedItemOnUi(item);
+
             if (e.DataView.Contains(StandardDataFormats.StorageItems))
             {
                 e.Handled = true;