this modification should make sure that lists of keys made of strings are always properly sorted according to their numerical part

con constrained e un-constrained e osservare curve coefficienti ottenute rispetto ad A,B,C

Quindi purificare

Conflicts:
	XRStools/roiSelectionWidget.py

solved the freezing problem with Chiara scans. Correcte read and write of rois to and from hdf5. Normalisation issue with izero still to be enquired