Export/ Analyse with Excel; enhanced to use new ISExcelSpreadsheet functionality

The Export/ Analyse with Excel functions have been enhanced to use the new ISExcelSpreadsheet functionality.

The "Analyse with Excel" function is available from any grid by right-clicking the grid and pointing to the Export sub-menu. This created a temporary "XML Spreadsheet" file and then opened it with Microsoft Excel.

Now this function creates an "Excel Workbook (*.xlsx)" file; which means a much better user experience.

Also, previously this function required Excel to be installed on the computer. Now, even if Excel is not installed, the grid can still be exported to an Excel spreadsheet. Instead of "Analyse with Excel" the menu option is "Save as Excel Spreadsheet".