ISFileUtilities; fixed issue with GetFileNameCleaned function

The finPOWER Connect Business Layer function ISFileUtilities.GetFileNameCleaned was incorrectly removing comma and percent sign characters.

The following characters are now stripped, ASCII 0 through 31, less than, greater than, colon, double quote, forward slash, back slash, pipe, question mark and asterisk.

In addition trailing spaces and full stops are removed.