show distance markers by default on route tracks

Author: digitaltom

app/javascript/maplibre/routing/osrm.js

@@ -85,7 +85,8 @@ export function initDirections (profile, feature) {
                                 "fill-extrusion-width": 1.5,
                                 "stroke-width": 5,
                                 "stroke": trackColor,
-                                "stroke-dasharray": true }
+                                "stroke-dasharray": true,
+                                "show-km-markers": true }
     let coords = decodePolyline(e.data.directions.routes[0].geometry)
     currentFeature = { "type": "Feature", "id": currentFeature?.id || functions.featureId(),
       "geometry": { "coordinates": coords || [], "type": "LineString" },