transformation widget cannot be re-used
Reported by @rarodrig
Similar to #83 (closed), the transformation widget is not reusable when running the workflow with another dataset.
Edit: the display gets reset: you need to select "RSM" or "Magnification" again while it should remember, unless RSM cannot be used (you need two motors for that I believe, while the dataset may only have one motor).
Edited by Wout De Nolf