Function end_column 

pub fn end_column(child: impl IntoUiNode, cell: impl IntoUiNode) -> UiNode

P Sets the content to the Align::END side of the button menu item.

The cell is an non-interactive background that fills the END_COLUMN_WIDTH_VAR and button height.

This is usually a little arrow for sub-menus.

See also end_column_fn for use in styles.