Removed the interface and ambient sound checkboxes from the audio options because the game automatically updates them. With the checkboxes the interface and ambient sounds could only be set to off or max volume. Additionally, the default volume for all sounds has been lowered to 50 because 100 is too loud.
This resolves the issue where players with foreign installs will have the blank ship control names. Now they'll at least still be displayed in English, but they can always be translated later. This commit also adds a few missing tool tips for the new controls.
