The difficulty lock warning screen shows the wrong difficulty after changing the difficulty

The warning screen that appears when locking the difficulty of a world through the World Options screen shows the incorrect difficulty. It always shows the difficulty when the World Options screen was opened.

Steps to reproduce:

1. Create a world and open the World Options screen

2. Change the difficulty

3. Click the lock icon

4. Notice how the difficulty in the warning screen is incorrect

Expected Result:

The warning screen should accurately reflect what will happen.

Observed Result:

The warning screen is wrong.