Plan B is to create a GUI program that will have two areas:
1. Select a set of CSV files
2. Select columns to plot and plot them

The select area will have a listbox for CSV filenames and two
buttons, ADD and DELETE.

The plot area will have two textboxes X-Column and Y-Column
and a PLOT button.

The program will remember the contents of the CSV file listbox
and the two column textboxes, so the user can just start the
program and press PLOT.