[BUG] 5D datasource support missing in .psf saving #1669

 Error whilst running File>&Save As
==============================================
python-microscopy=26.03.26.post0.dev[git]
python=3.11.14, platform=win32
numpy=2.4.2, wx=4.2.4 msw (phoenix) wxWidgets 3.2.8

Traceback
=========
Traceback (most recent call last):
  File "C:\Userfiles\andrew\code\python-microscopy\PYME\ui\progress.py", line 153, in func
    return fcn(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^
  File "C:\Userfiles\andrew\code\python-microscopy\PYME\DSView\dsviewer.py", line 322, in OnSave
    self.image.Save()
  File "C:\Userfiles\andrew\code\python-microscopy\PYME\IO\image.py", line 1476, in Save
    self.save(filename=filename, crop=crop, roi=roi, progressCallback=progressCallback)
  File "C:\Userfiles\andrew\code\python-microscopy\PYME\IO\image.py", line 1511, in save
    self.filename = dataExporter.ExportData(self.data_xyztc, self.mdh, self.events, defaultExt=self.defaultExt, filename=filename, progressCallback=progressCallback)
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Userfiles\andrew\code\python-microscopy\PYME\IO\dataExporter.py", line 467, in ExportData
    exp.Export(ds, filename, slice(0, ds.shape[0], 1), slice(0, ds.shape[1], 1), slice(0, ds.shape[2], 1),mdh, events, origName, progressCallback=progressCallback)
  File "C:\Userfiles\andrew\code\python-microscopy\PYME\IO\dataExporter.py", line 377, in Export
    cPickle.dump((data[xslice, yslice, zslice], metadata['voxelsize']), fid, 2)
                  ~~~~^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Userfiles\andrew\code\python-microscopy\PYME\IO\DataSources\BaseDataSource.py", line 317, in __getitem__
    raise IndexError('Must provide slices/indices for all 5 dimensions')
IndexError: Must provide slices/indices for all 5 dimensions