new route, intersectionPreset bugfix

Assets/Editor/IntersectionPresetEditor.cs

@@ -4,6 +4,7 @@ using Routes;
 using TrafficSimulation;
 using UniRx.Triggers;
 using UnityEditor;
+using UnityEditor.SceneManagement;
 using UnityEngine;
 [CustomEditor(typeof(IntersectionPreset))]
 public class IntersectionPresetEditor : Editor
@@ -17,6 +18,7 @@ public class IntersectionPresetEditor : Editor
 
     public override void OnInspectorGUI()
     {
+        serializedObject.Update();
         EditorGUILayout.LabelField("Traffic System");
         EditorGUILayout.Space();
         EditorGUILayout.PropertyField(serializedObject.FindProperty("trafficSystem"));
@@ -80,6 +82,7 @@ public class IntersectionPresetEditor : Editor
         {
             SetTrigger("out","l");
         }
+        serializedObject.ApplyModifiedProperties();
     }
 
     private void PositionSpawns()