This function will convert the complete file from Unicode, ASCII or UTF-8 (Unicode representation internally) to UTF-8 encoding. The file will however not be internally stored as Unicode and as such the multi-byte UTF-8 characters will display as upper ASCII characters and not the UTF-8 character they represent. When the file is saved it will remain as UTF-8 unless specifically converted to another format by the user. The status bar will NOT indicate this file format as it has no different structure from an ASCII file.
