AddAdditionalSelectItemKeys() now takes a string specifying additional keys rather than an array of strings.  For instance, if you want both lowercase 'e' and uppercase 'E' to allow selecting an item, the call would look like this (assuming lbMenu is the menu object):
lbMenu.AddAdditionalSelectItemKeys("eE");

Also, changed AddAdditionalQuitKeys() to work the same way.

Note: If you are using SlyVote, you will need to also update SlyVote, since SlyVote has also been updated to call AddAdditionalQuitKeys() this way.