GL Export; Now supports special tags in Export File Name

The GL Export now supports special tags in the Export File Name.

These include:

[GlExportId] - is replaced by the GL Export Batch Id.
[YMD] - is replaced by the current Year, Month and Day.
[HMS] - is replaced by the current Hour (24 hour clock), Minute and Second.
[HM] - is replaced by the current Hour (24 hour clock) and Minute.