Add camera start to transect entry even when taking images throughout survey area.

multiple polygons

need to fully implement vertexvisibility

[Survey transects generation] move some of the logic handling out of function that handles only one polygon

Fixed camera shot count when trigger distance == 0

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Also don't save to settings

This prevents intersection misses on more cases

Fixed bugs the unit test found