set all jamming frequency values to the same level, change to complexInverse fft instead of multiplying by -1 and complexforward fft

Show Toast on no location at the right place (on 0,0 location but only if the option chosen was an Always one)

Activate alert also when opening the app in blocking state (because of preventive blocking). But check if already blocking before trying to block again... Otherwise microphone already blocked... By us.