fixing bug with enable_hover
fixing bug with enable_hover

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