Reverse waypoints tweak

After using this (very useful) feature operationally I have a suggestion; Perhaps the reverse waypoints function on Flight plan screen (Map Tool-> Reverse WPs), should only alter waypoints and ignore mission commands such as TAKEOFF/LAND DO_SET_CAM_TRIGG_DIST as these almost never need to be reversed. It you are not careful when using this feature a user could inadvertently set DO_SET_CAM_TRIGG_DIST=0 at the new start of the mission.

Start in the Flight plan screen at Map Tool -> Reverse WPs and trace the reverse-waypoints action. Confirm how waypoint entries and mission commands such as TAKEOFF, LAND, and DO_SET_CAM_TRIGG_DIST are represented; done means reversing waypoints without reversing those commands, with the reported trigger-distance risk no longer occurring.

Written by the indexing model from the issue text.