improved prev/next button iconography
comment out play/pause/more buttons from master button group
add time and passive data attributes to panels
merge prev & next disabler into a single function
minor code reshuffle
add start btn fn and comment out all old button fns
drop in all other new button fns; don't work yet
debugging why new buttons don't work
cleanup
added static div for testing
modify panels so elapsed time isn't shown until step is active
added static div for testing
improve tick trigger to add red highlighting & sound when time expires
remove console test
prev/next code cleanup; discrete smoothScrolling fn
comment out static test panel div
try to pass panel div ID to tick event trigger
add class for playing
comment out old timer countdown functions
add tooltips to prev/next along with simpler along with simpler icons