Much-Requested additional volume controls, LOD bias slider, and more!

Hey team,

I spent the last couple weeks integrating requests/suggestions and bugfixing; I hope you enjoy the results!

Changelog:

o Added Master and Aircraft volume controls to complement the Music volume control.
o Added a Level of Detail Bias slider to the quality menu.
o Aircraft health display turns red below 31.
o Aircraft sparks and smokes based on level of damage; full-time red tint removed.
o Field of View added to start menu options; start menu options reorganized.
o Engine pitch changes with power level.
o Appropriate sliders indicate level while not selected.
o Auto-level velocity changed to read "disable at xxKTS".
o Civilians approach the right side of the helicopter, at a greater distance.
o Most menu buttons wrap vertically; badge and remapping menus being notable exceptions due to logical complexity.

Bugfixes:

o Framerate no longer defaults to 60fps in spite Quality settings changes.
o Objective and FARP landing logic updated to significantly reduce the occurrence of negative landing detection.
o Sliders reset correctly no matter their selection state when disabled.
o General menu cleanup

Thanks for everything, and as always don't hesitate to let me know if you have any issues or recommendations!

-Joe