Provide dragged files as StorageFile when possible (#6698)

Author: gave92

Files/BaseLayout.cs

@@ -821,6 +821,11 @@ protected async void FileList_DragItemsStarting(object sender, DragItemsStarting
                 return;
             }
 
+            var onlyStandard = selectedStorageItems.All(x => x is StorageFile || x is StorageFolder || x is SystemStorageFile || x is SystemStorageFolder);
+            if (onlyStandard)
+            {
+                selectedStorageItems = await selectedStorageItems.ToStandardStorageItemsAsync();
+            }
             if (selectedStorageItems.Count == 1)
             {
                 if (selectedStorageItems[0] is IStorageFile file)

Files/Filesystem/StorageFileHelpers/StorageFileExtensions.cs

@@ -369,7 +369,7 @@ public static async Task<List<IStorageItem>> ToStandardStorageItemsAsync(this IE
                 }
                 catch (NotSupportedException)
                 {
-                    // Ignore items that can0t be converted
+                    // Ignore items that can't be converted
                 }
             }
             return newItems;