First steps towards having per-monofx-channel graphical EQ in Euphoria,
it's in the UI but does nothing...
Continuing with the tiny baby-steps:  Some infrastructure to accomodate the
forthcoming ports...
Add some functions for doing EQ6 on single samples...
After an incredible amount of effort, per-monofx-group graphical EQs work.

TODO:
1.  Test backwards-compatibility
2.  Update when changing mono-fx group
Properly update the display when changing monofx groups.
A performance optimization for EQs...
More performance optimization.
Better layout of tabs that don't need to scale...