Clears unattached "note meta-data" and note-offs. The two processes are separated in the GUI as sometimes unattached meta-data is not junk and should be saved.
Access via Pattern Menu and Keybinding:
"Clear Junk Data"
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Version 1.21
--new pattern range scope added to apply to specified range in a song
Version 1.1
--changed: Note-off delay values are no longer deleted