Add road trip ending in Odometer Graph

Add the option to visualize the ending of a created road trip in the Odometer Graph. At this moment there is just a line at the date we mark the start of the road trip. It would be nice if there was a second line marking the end date of the road trip and in between those lines it would be colored. That way, we could see which portions of the Odometer Graph were filled during the different road trips we marked. In the attached image, there is an example of how it could look.