Dropdown with navigation set to None

In all of my UI, I only want the mouse to interact with them so I set every single navigation option to None. The problem is all of my dropdowns can be interacted with using space, wasd, and the arrow keys.

In the inspector I can’t find anymore navigation options that can be set to None.

I think the problem is that in Play mode, when I select the drop down, the gameobject that gets created for the drop down has navigation options that are automatically set to Explicit.

I can’t find any way to change these options to None in Edit mode.

I found a solution.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using TMPro;

public class ChangeOptionDatatTEST : MonoBehaviour
    [SerializeField] TMP_Dropdown dropDown;

    //Create a new navigation
    Navigation NewNav = new Navigation();

    [SerializeField] Toggle[] toggles;

    private void Start()
        NewNav.mode = Navigation.Mode.None;

    private void Update() //Replace with actual function
        if (Input.GetKeyDown(KeyCode.I))  
            toggles = GetComponentsInChildren<Toggle>();

            for (int i = 0; i < toggles.Length; i++)
                toggles[i].navigation = NewNav;

Never mind. This does not fix the issue completely. Even though all the navigation options are set to none, I can still interact with the dropdown with the space bar. I only want to be able to interact with the dropdown using the mouse. Please help.