Change Notes:
-Bug Fix: Fuel consumption counting backwards
-Bug Fix: Acog Scope not aligned properly after loading the game
-Bug Fix: Duplicated acog scope
-Bug Fix: Large inventory won't be saved(after increase inventory skill)
-Added discard items option
-Bug Fix: Mission count down timer will not pause when the game is paused.
-Bug Fix: Blinking screen when loading the game
-Cancel sleep button is made more visible
