MVC Compute module : trial plotting doesn't plot raw data if plotting again after selecting processed or both

[hugodumoulin]

When asked which data to plot after a trial or after sating yes to plotting again, if you do not use the "plot raw only" option, it will become impossible to "plot raw only" for this trial and the next ones unless you reload the module.

This is a simple fix, the "plot raw only" option was missed in /processing/compute_mvc.py line 357 if statement :

if plot != "c":
    if plot == "p":
        data = processed_data
        legend = ["Processed"]
    elif plot == "b":
        data = [raw_data, processed_data]
        legend = ["Raw data", "Processed"]

just add

elif plot == "pr":
    data = raw_data
    legend = ["Raw data"]