Route planner: reverse route

Sometimes, especially when planning round trips, it would be useful to be able to reverse the plan (sequence of via-points) in the planner, to see which direction is easier/better to go.

I know I could save the track and then reverse it from the track list, but that's too many clicks away and leaves a lot of garbage in the list.

I'd also like to make changes to the original/reversed track to see how it changes.