Get list of spectrometers requesting user to connect one or abort if none found.
See also
Other interactive acquisition utility functions:
choose_ch_interactive(),
choose_sr_interactive(),
f.trigger.message(),
protocol_interactive(),
set_attributes_interactive(),
set_folder_interactive(),
set_seq_interactive(),
set_session_name_interactive(),
set_user_name_interactive(),
set_wlrange_interactive(),
tune_interactive()
