Merge pull request #186 from w-ahmad/flyout_datacontext

set cell & row flyout's datacontexts to backing item on Uno

Author: w-ahmad

src/TableView.cs

@@ -1384,9 +1384,10 @@ internal bool ShowRowContext(TableViewRow row, Point position)
 
         if (RowContextFlyout is not null && !eventArgs.Handled)
         {
-            var presenter = row.FindDescendant<ListViewItemPresenter>();
-
-            RowContextFlyout.ShowAt(row, new FlyoutShowOptions
+#if !WINDOWS
+            RowContextFlyout.DataContext = row.Content;
+#endif
+            RowContextFlyout.ShowAt(row.CellPresenter, new FlyoutShowOptions
             {
 #if WINDOWS
                 ShowMode = FlyoutShowMode.Standard,
@@ -1411,6 +1412,9 @@ internal bool ShowCellContext(TableViewCell cell, Point position)
 
         if (CellContextFlyout is not null && !eventArgs.Handled)
         {
+#if !WINDOWS
+            CellContextFlyout.DataContext = cell.Row?.Content;
+#endif
             CellContextFlyout.ShowAt(cell, new FlyoutShowOptions
             {
 #if WINDOWS