Splash sound fix

Only BULK1 sound was used before, but now BULK2 will be used too,
according to the object splashing speed in the liquid.
Splash sound fix 2

Feature to go in water silently on low speed
Menu scroller sound

Added sound MENU_MOVE to settings with scrollbars, as in the classic
game
Merge pull request #2 from binarymaster/Current

Splash sound fix