Cross Track Point和Trail的进一步制作，修复Duplicate的Guid Bug

Ctrl+M切摄像机

Assets/Scripts/EditorGame/GameElements/GameCamera/GameCamera.cs

@@ -153,7 +153,7 @@ namespace Ichni.RhythmGame
 
             public override GameElement DuplicateBM(GameElement parent)
             {
-                return GameCamera.GenerateElement(elementName, elementGuid, tags, false,
+                return GameCamera.GenerateElement(elementName, Guid.NewGuid(), tags, false,
                     parent, cameraViewType, perspectiveAngle, orthographicSize);
             }
         }