make Wave selector in sound editor use a radial selector on right-stick-push nf-efs8 ← Beads

Twinned from https://github.com/cfsh/ninefold/issues/72 by tools/beads/import_github.py's reconcile pass.

and make it clearer visually that this thing is a togglable / switchable thing, jsut looks like plaintext at the moment.

also make the test sound remembered, so e.g. if I play F, then toggle waveform - it's playing F's as i change waveform