Changed 'deact' to 'enable' in OSC output; tweak to OSC spec. (surge-…

…synthesizer#7621)

* Changed 'deact' to 'enable' in one final place; tweak to OSC specification

* Missed one place where 'enabled' is changed; now echoing the change properly. Also, needed logic inversion for query output for 'enabled'.

Signed tag for the 190 release

Signed tag for Release 1.6.4

Merge branch 'cleanup'

Fixed surge-synthesizer#5

Make sure idle gets called for VST3

Fixes surge-synthesizer#1