2 small ideas for the GUI

When we minimize a track, several elements disappear (track number and volumeters), however, the track name remains behind the track buttons... and it doesn't look very nice XD.

If the pseudo-plugins (they all perform a send function) were the same color as the audio, and the MIDI pseudo-plugins the same color as the MIDI, the "sends" could be much more easily distinguished from the actual plugins, which would help to have a clearer overall view.