fix change password doesn't work

[AliveMen]

add and use NonEditableUsers setting

[tatarincev]

Could you explain how these changes related to this particular issue?

[AliveMen]

Admin didn't have ability to change password because

services.AddSecurityServices(options =>
            {
                options.NonEditableUsers = new[] { "admin" };
            });

I've removed options.NonEditableUsers = new[] { "admin" }; from startup and add NonEditableUsers setting like in platform v2.