Some Minor Fixes — In Extremis Steam update #174189

Hello. Got some strange negative reviews lately mentioned what turned out to be nonexistent issues regarding control customization; but since I was doing some INX spring cleaning, took the opportunity to review some persistent audio complaints I got (game is like eight years old and the title theme could not be muted till now, would you look at that). Either way, getting nonsense reviews is part of having an authoral free game on steam. Onwards to Mostly Negative I guess!