fixes for styling changes in marker lines
fixes for styling changes in marker lines

dmadeka/bqplot,ChakriCherukuri/bqplot,ssunkara1/bqplot,SylvainCorlay/bqplot,ChakriCherukuri/bqplot,rmenegaux/bqplot,bloomberg/bqplot,rmenegaux/bqplot,ssunkara1/bqplot,SylvainCorlay/bqplot,bloomberg/bqplot,SylvainCorlay/bqplot,ChakriCherukuri/bqplot,bloomberg/bqplot,dmadeka/bqplot