UX: fix #2257 , clearer UI for splitting a road

assets/layers/split_point/split_point.json

@@ -16,7 +16,13 @@
       "marker": [
         {
           "icon": "circle",
-          "color": "white"
+          "color": {
+            "render": "white",
+            "mappings": [{
+              "if": "reuse=yes",
+              "then": "#cccccc"
+            }]
+          }
         },
         {
           "icon": "./assets/svg/scissors.svg"

assets/layers/split_road/split_road.json

@@ -17,13 +17,33 @@
           "icon": "bug"
         }
       ]
+    },
+    {
+      "location": [
+        "waypoints"
+      ],
+      "iconSize": "4,4",
+      "anchor": "center",
+      "marker": [
+        {
+          "icon": {
+            "render": "circle",
+            "id": "circle"
+          },
+          "color": "#888888"
+        }
+      ]
     }
   ],
-  "lineRendering": [
+  "lineRendering": [    {
+    "width": "13",
+    "color": "black"
+  },
     {
       "width": "8",
-      "color": "black"
+      "color": "white"
     }
+
   ],
   "allowMove": false
 }