Phase diagram slow
Phase diagram are slower to render in the GUI than the notebook. For now each loop that send a plot to the GUI is followed by
time.sleep(0.25)
(number is kind of arbitrary), in order to let the React component render each step properly.
In order to render the plot more smoothly (hopefully) and avoid that, a message should be sent from the front-end when the rendering has finished, telling the kernel to proceed to the next loop.