Analysis function names not updating in plot settings window

[JKThanassi]

When adding a function to the dictionary, the name does not show up in the list in the plot window settings.

[cduff4464]

Hey Joseph I was talking to Tim today, code you add a text file that explains how to add functions while in a live python session?

[JKThanassi]

@cduff4464 yeah, I can do that tomorrow

[cduff4464]

Thanks

[JKThanassi]

added the file in this pr