transit review tweaks

[paulwinterbauer]

Rename start/end position to position 1/2.

Check whether positions between ports are considered: 3024573

Shade transit stats red when exceeds 400 mi/day, add an info tooltip explaining the 400 mi/day benchmark

Modify benchmark to 500 mi/day.

See if points within managements can be given some wiggle room.

Map: make the position dots render over other dots (ie last port).

See if edited points can be dropped from the map.

[paulwinterbauer]

prevent the same point from being queued for review if it is already pending review.