Cleaned up host/MIDI global settings delegation.
Removed global MIDI settings storage in private data.
Added missing atoms for global MIDI settings so that they can be controlled through Belcanto, Stage and Workbench.
Merge branch '2.0' into 2.1
Moved newly added host_plg atoms to not step on other atoms that have been added in EigenD 2.1
Merge branch '2.0' into 2.1