track-options: midi pan
midi-initial-volume + list of all props
Midi volume -39 to 0 (issue #6)
expand sliders (with labels) on mouse hover
properties can set :snap-to-ticks?
add note index to notes
new get-note-for-x + set note highlight
nicer note highlighting
set track-property slider background
keep divider location when resizing
score scaling
open-test-score separate function
"scale" label
manual watchers (for reloading)
not as wide rulepalette.ui
improved rulepalette options view
use mig instead of horizontal-panel
greyed out rule-interact-num
move (load-rulepalette-container) to global
active-p track property