Update notes for 3.1.9

- Add controls / hotkeys editor in options
- Swapped camera move and rotate controls, now middle button moves map around
- Add text in list when there is no active multiplayer games or servers are unreachable
- Add mouse button 4 and 5 support
- Added missing BONEYARD map
- Filth nests no longer can be captured like buildings
- Fix no power icon appearing in filth nest
- Fix locked camera when playing ET maps in survival mode
- Fix another crash during teleporting scene
- Fix crash when playing audio effects when multiple output devices were present
- Don't interrupt alpha expedition music with battle / shielded music in VULCAN / ZABRICK missions
- Fix ET maps in Battle / Survival modes having fixed music tracks regardless of your faction
- Fix linux not setting proper window resolution when changing from options
- Fix Battle team colors not being set properly after first page