Enable DNS filtering module with the selected system DNS by default

[adbuker]

Starting from the 7.12 nightly 5 the DNS module will be enabled by default with the selected system DNS address

[Kobi-Blade]

This is the opposite of an enhancement considering Adguard DNS servers speed, I hope the option to turn it OFF remains, else I'll remain with Adguard 7.10.2 after the issues 7.11 presented.

There also no reason to waste resources on a module that is not being used (if it's using System DNS, is not doing anything), so this is more of a regression.

Adguard latest enhancements have been a little forced and don't actually improve the user experience.

[zubrRB]

Если в системе установлена сторонняя служба dnscrypt-proxy (через 127.0.0.1) по DNS-over-HTTPS (DoH).
И если задать в DNS-защите системный DNS и использовать DNS фильтр, то будет какой-то толк от этого?
(С учётом и без учёта опции в расширенных настройках фильтрации зашифрованных DNS-запросов)