Hide Node dock successfully on undo/redo and deletion

Fixes #84530.

editor/node_dock.h

@@ -58,6 +58,7 @@ public:
 protected:
 	static void _bind_methods();
 	void _notification(int p_what);
+	void _on_node_tree_exited();
 
 public:
 	void set_node(Node *p_node);