Make Warp to Maneuver Node lead time tunable

Currently, "Warp to Maneuver" warps to 1 minute before the maneuver. This seems to cut a bit too close, especially for heavy ships or ships with a weak RCS.

I would like to suggest raising the lead time to 2-3 minutes to allow for less positioning with less maneuverable ships.

The best case would be if the lead time is tunable, so that users can adjust that time as needed.