match the style of scale track to the IGV's
match the style of scale track to the IGV's

snaheth/pileup.js,hammerlab/pileup.js,hammerlab/pileup.js,piotr-gawron/pileup.js,piotr-gawron/pileup.js,piotr-gawron/pileup.js,snaheth/pileup.js,snaheth/pileup.js,piotr-gawron/pileup.js,snaheth/pileup.js,hammerlab/pileup.js,hammerlab/pileup.js