
Below are the ID numbers representing which history list is to be managed.

0   Instrument History   Individual externally sourced instruments
1   Patch History        Full instrument patch sets
2   Scale History        Complete microtonal settings
3   State History        Entire system state
4   Vector History       Per channel Vector controls
5   MidiLearn History    Learned MIDI CC lists

These values have now been superceeded by named constants in globals.h
