there's a strange behaviour of the scalars window (see a screen
I run a script which opens a dataset and produces some scalars.
Then I open the scalars windows to view the output.
Without closing the scalars windows I re-run the script twice by
changing only the dataset filename to be opened and analyzed.
The scalars window is not refreshed and the new scalars are piled
up to the old ones keeping the same names and, some of them
showing strange values. Some new and not requested scalars appear
for the first time (the 'i's in the picture) while some others
supposed to be deleted still appear (the 'essai's in the picture).