Added context informations to the informations exported by copy to clip board( verbatim or json ). These are the file name and the slice index when the cube is 3D

Now modals containing measurements results have a copy and copy as json buttons to store the contents of the modals in the clipboard

Fixed a bug in the calculations of the cumulative distribution function. Nan values are not any more taken into account

Added the plot of the cumulative distribution function in the Contour settings GUI and added the possibility to un/fold the histogram and cumulative distribution function part in the GUI

Fixed a bug in DataBlock.__getAverage_0. La méthode compute (cf. dask) was called one time in excess