submodule bug fix & Clip extend

移除submodule重复引用的问题，
Clip现在可以保存任意GameElement，且任意指定物体作为父物体加载

Assets/Scripts/Manager/BasePrefabsCollection.cs

@@ -52,6 +52,7 @@ public class BasePrefabsCollection : SerializedScriptableObject
     public GameObject baseColorPicker;
     public GameObject emissionColorPicker;
     [Title("DynamicUI相关-Composite")]
+    public GameObject generalSecondaryWindow;
     public GameObject compositeParameterWindow;
     public GameObject inputFieldUnit;
     public GameObject animatedFloatUnit;