Exports the contents of a dataset as an Excel spreadsheet, prompting the user to save the file to disk. Uses the same format as the dataSetToExcel function.
This scripting function has no Client Permission restrictions.
system.dataset.exportExcel(filename, showHeaders, dataset)
String filename - A suggested filename to save as.
boolean showHeaders - If true (1), the spreadsheet will include a header row.
Object dataset - A sequence of datasets, one for each sheet in the resulting workbook.
String - The path to the saved file, or None if the action was canceled by the user.