Add IsUsed column to output of INFO.VIEW.MEASURES() and INFO.VIEW.COLUMNS() functions

[EHA_SD]

As part of the INFO.VIEW.MEASURES() or INFO.VIEW.COLUMNS() table functions it would be great if a new column could be added to the table output that is a flag for whether the measure or column is in use anywhere in the workbook. The column would be similar to the IsHidden column.

This would facilitate cleaning up of workbooks greatly.