Handle the case of an empty stylesheet when saving a figure
Handle the case of an empty stylesheet when saving a figure

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