Snap maneuver to points

It would be very helpful (especially on mobile where it's not nearly as easy to position maneuvers) if when dragging past it, the node would stop on apo, peri, AN/DN, and closest approach. Not such a big deal on desktop, but very tricky on mobile for precise stuff. (Something similar was mentioned in a comment on this suggestion: https://www.simplerockets.com/Feedback/View/67YK3B/Ability-to-select-ascending-and-descending-nodes-when-planning-burns, but it was not the main suggestion, so I've put this here)