Add a 4th oscillator to Way-V for those uber-FM sounds...
The FM mod macros sort of work now (except that they don't).
Fixed the shenanigans with the new FM macros...  A smoother was being
initialized incorrectly (reversed high and low values).
Add a run-time check to ensure that the previous bug never happens again...
Move the presets combobox to the Master tab...
Don't mix oscillators at all if at the lowest volume setting...
More responsive macro knobs.
Add a context menu for working with the macros by setting them directly
from the knobs....
Minor performance, scalability and correctness tweaks...