In the Gantt view, when I collapse a task's subtasks, instead of showing the parent's unrelated start and end date bar on the view pane, I'd like to see the child tasks' bars (overlapping if necessary, using transparencies) all plotted on the parent's row. This will make it easier to see the state of a large project on a smaller screen, rather than having to scroll through unravelled rows and rows of subtasks.

Here's an example I found via Google: https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRVAvst2mFXJgL7glV8wbbcmbAuopaH5G1VDg&s