Minor panzoom bug
Minor panzoom bug

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