API data-obj:  enforce Dataset keys to valid variable names
API data-obj naming:  make auto-generated names valid
RM Factor.project():  same can be achieved with indexing
FIX Factor._child_kwargs():  cases where name is None
API data-obj:  use name=None or name=True
ENH:  ADD Var.split()
DOC testnd
ENH MneExperiment:  add `lobes` parc
DOC MneExperiment
FIX MneExperiment:  allow “” parc
DOC NDVar
FIX mne:  mne_fixes.write_labels_to_annot()

Always write both hemispheres
WIP GUI
WIP GUI:  incorporate SelectEpochs GUI
WIP GUI:  auto-run
WIP plot:  `frame` argument
DOC plot
WIP GUI
ENH morph_source_space():  treat scaled fsaverage appropriately
API morph_source_spaces() arg order:  vertices_to, morph_mat