More IO fixups for utf-8 support on Windows
This provides utf-8 support for a few more IO classes on Windows.
The classes that have been changed are:
- vtkTeclplotReader
- vtkTIFFReader and vtkTIFFWriter
- vtkNIFTIImageReader and vtkNIFTIImageWriter
- vtkDirectory
Since vtkDirectory is used internally by several other classes, the following will also see improved utf-8 support:
- PIOAdaptor
- vtkOpenFOAMReader and vtkPOpenFOAMReader
- vtkRTXMLPolyDataReader
- vtkDICOMImageReader
Closes: #17779 (closed)
Edited by David Gobbi