Reverse cell painting for Windows

Apparently Windows might not respect painting with a transparent alpha,
so reverse the paint order

Fixes https://gitlab.com/kicad/code/kicad/-/issues/21635

include/widgets/grid_striped_renderer.h

@@ -39,17 +39,12 @@ public:
     void Draw( wxGrid& grid, wxGridCellAttr& attr, wxDC& dc,
                const wxRect& rect, int row, int col, bool isSelected ) override
     {
-        // First draw the striped background for empty cells
-        wxString cellValue = grid.GetCellValue( row, col );
+        // Draw the foreground content using the base renderer first
+        T::Draw( grid, attr, dc, rect, row, col, isSelected );
 
-        if( cellValue.IsEmpty() )
-        {
+        // Overlay striped background for empty cells
+        if( grid.GetCellValue( row, col ).IsEmpty() )
             drawStripedBackground( dc, attr, rect, isSelected );
-            attr.SetBackgroundColour( wxColour( 0, 0, 0, wxALPHA_TRANSPARENT ) );
-        }
-
-        // Then draw the foreground content using the base renderer
-        T::Draw( grid, attr, dc, rect, row, col, isSelected );
     }
 
     wxGridCellRenderer* Clone() const override