add more blocks

Project/Assets/ML-Agents/Examples/PushBlock/Scripts/PushBlockEnvController.cs

     public class AgentInfo
     {
         public PushAgentCollab Agent;
+        [HideInInspector]
+        [HideInInspector]
+        [HideInInspector]
         public Rigidbody Rb;
 
     }
     {
         public Transform T;
+        [HideInInspector]
+        [HideInInspector]
+        [HideInInspector]
         public Rigidbody Rb;
     }