Request: Display flight line with camera triggering on as a different color than when off

When creating a large flight plan using "breakup starts", we end up with a huge number of WP and commands that need to be carefully reviewed for errors. As a visual aid it would be helpful to change the color of the flight line when CAM_TRIGG_DIST is not zero. Then I could easily see at a glance if I made an error that would fail to trigger an entire flight line. This would only need to be on the Flight Plan tab, since it is for planning only.

Start in the Mission Planner Flight Plan tab and trace how flight lines are rendered alongside CAM_TRIGG_DIST commands. Done means flight lines visibly use a different color when CAM_TRIGG_DIST is nonzero, while planning behavior elsewhere remains unchanged.

Written by the indexing model from the issue text.