(UI 0.9.9)
A Grid is a control which is allows the arrangement of children into a grid
$control,$left,$top,$xspan,$yspan,$hexpand,$halign,$vexpand,$valignUI\Controls\Grid::FillUI\Controls\Grid::StartUI\Controls\Grid::CenterUI\Controls\Grid::EndUI\Controls\Grid::LeadingUI\Controls\Grid::TopUI\Controls\Grid::TrailingUI\Controls\Grid::BottomContains controls, should not be manipulated directly