Feature Wish: set "Start" and "End" icon where the stop_position is

[osm-ToniE]

Here https://relatify.monicz.dev/?relation=7853739&load=1#map=19/47.868148/11.474037 the "S" is placed on the middle node of the way, the stop_position is on the first node https://www.openstreetmap.org/way/168730182

• "S" should also be the first node of the journey (first or last node of the first way, depending on it's direction as an OSM vector)
• "E" should also be the last node of the journey (last or first node of the last way, depending on it's direction as an OSM vector)

Marking a stop_position as "S" or "E" might result in the need to split the relevant way to achieve the things said above.