ISList.RemoveDuplicates; updated comments

The comments for the finPOWER Connect Business Layer function ISList.RemoveDuplicates have been updated to make it clearer what the function does and doesn't do.

Function summary:

Remove duplicates from a 'Sorted' List.

Function remarks:

You should call the "Sort" method before calling this method to ensure the List is sorted.
Alternatively, to avoid adding duplicates in the first place, set the doNotAddIfDuplicateExists parameter to True in the "Add" method.