unfold hierarchy: Information rate not updated

[stephanebouget]

problem with information rate (but without save current hierarchy)

• I load a small file without auto-unfold and 18 clusters
• I fold the coclustering to 10 clusters with "Select automatically the best unfolding" : the information rate for 10 clusters is equal to 93,2%
• click Ok
• I re-open the "Select automatically the best unfolding" : the displayed information rate for 10 clusters is 100%

Originally posted by @carinehue in https://github.com/KhiopsML/kc-electron/issues/150#issuecomment-2175457694