Features option - Make parameters read from the JSON file non-adjustable on the Options Tab of the GUI

[sasaray]

When the features option is used, most parameters of the simulation is read from the json file. These are the amplitudes, delay, duration, tstop.
It would be good if these were only displayed on the GIU but could not be modified by the user.

It would be also very important to make the amplitudes automatically accepted, as currently the user has to press the accept button, otherwise the values are not stored which causes unwanted behavior.