Select Montage from TRC file
Summary
When plugin runs, a window with a dropdown menun should appear to choose from all possible montages. User must choose one of these, and may modify in order to perform the FastWave analysis.
New modified montages are not being saved, but only useful for analysis.
3 columns in the GUI: electrode 1, electrode 2, checkbox (do you want bipolar / referential checkbox for this channel). First autocomplete with the electrode sequence and checkbox disabled.