UI to rename the I/O channels for use with JACK/ASIO/et alia

When pairing up input or output channels between apps using JACK it would be preferable to have a user customizable name for the channels.

For example, in the list of connexions available from Renoise in the other app, instead of “output_01_L” appearing, it would be a lot clearer if it could read “SuperSaw_L”.