New UX: Add functionality to hide top level in list when it's used as line item in grid

New UX: Add functionality to hide top level in list when it's used as line item in grid

When a list formatted item with a top level is used as a line item in a grid, there is no option to hide or make the top level not selectable without completing a workaround.   This request is to add an option to hide top level or make the top level uneditable/selectable on new UX page.