[v3.0] Bug fixes and internal updates

Fixed Iceland crash when playing in offline mode

Fixed airplanes callsign position
Air traffic is also filtered now by groundspeed (Cyprus had air traffic which was on ground at Ben Gurion (LLBG) airport)
Added icon for game window
Changed release archives name
Removed tastatura.txt
Removed console for Windows users
Lowered volume of loading screen and ATC voice