Function attach_rich_tooltip_content_with_placement 

pub fn attach_rich_tooltip_content_with_placement(
    ctx: &mut BuildContext<'_>,
    anchor_id: WidgetId,
    content: TooltipContent,
    delay: Duration,
    placement: TooltipPlacement,
) -> WidgetId

attach_rich_tooltip_content with an explicit TooltipPlacement.