Interactive plot in coercivity_unmixing_MaxUnmix.ipynb is not working

[bellon-donardelli]

This bit right here:

%matplotlib widget
one_fit = rmag.interactive_backfield_fit(MaxUnmix_experiment['smoothed_log_dc_field'],
MaxUnmix_experiment['smoothed_magn_mass_shift'],
n_components=1, figsize=(6, 3), skewed=False)