When using the Export & Print Timetables function and exporting to a single PDF file, there is currently no indication that the Export is 'in progress': the "Export Timetables" button remains active (and if you click it again the first export fails with a file error), and nothing shows on screen until all of the timetables have been exported.
Please could this be changed so that there is some indication that the export is in progress, even if it only greying out the "Export" button?
