* Activating TX Low Pass Filter in Second IF IC
* solving PR conversation revisions
* Final TX LPF decision for ADSB_TX
* Small comments correction.
* Added set TX LPF also in APRS, BurgerPgr,Jammer
* GCC12 related fixes but still compiles on GCC9
* Suppress warnings about volatile +=
* Enable c++20 if supported by the compiler
On gcc12 we need to use -std=c++20 since constexpr .c_str() on std::string is only officially available since c++20 and the new gcc wouldnt let us use it with older standard
* code format
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Co-authored-by: Eisenberger Tamas <e.tamas@iwstudio.hu>
