Make it so that operators can change the server difficulty without commands

At the moment, the complexity of the server can only be changed using the /difficulty command, which is available only to server operators, or by editing the "difficulty" line in a text file with server settings. For ordinary players, the "Server Difficulty" button in the "Online" section is unavailable, and the most they can do is just look at the server difficulty but not change it. And the strangest thing is that with the complexity of the server, this button is inaccessible even to operators, which is as strange as possible. I suggest making sure that the button with server complexity is not available to ordinary players, but it is available to operators.