Session should be the object holding the list of inputs parameters (e.g. synchrony) and the list of source callbacks. This also avoids mixing input when copying sources. Code could be improved but is operational.
New Timer window in UI for Metronome (Ableton Link management) and replaces Timers. Former Timers in Metrics are replaced with Runtime (of session, of program and of total vimix runtime in settings). Temporarily disconnected Metronome from MediaPlayer actions.