MMS ExcelLoad: Normalize path names before writing them
to the gseos.ini file. Also compare to normalized path names.
This allows switching between Linux and Windows configurations
without upsetting path names.
MMS ExcelLoad: When the special value "ExcelFileName" is
configured in the node for a specific file name we
default to the Excel file name instead of the block definition
file name.
MMS ExcelLoad: Disable writing to gseos.ini file with the entry: