duty dial is accessible even for non-square waveforms. nf-hlu2 ← Beads

Twinned from https://github.com/cfsh/ninefold/issues/99 by tools/beads/import_github.py's reconcile pass.

maybe we should start to put the dials in 2 rows

first row - 'AMP controls' (attack, decay, release, vol - put vol first too) second row can be WAVE controls - for now just Duty. So clearer when that's disabled / rewritten for different waveforms.