Fixed background_fill attribute inconsistency between bokeh versions
Fixed background_fill attribute inconsistency between bokeh versions

basnijholt/holoviews,vascotenner/holoviews,ioam/holoviews,basnijholt/holoviews,vascotenner/holoviews,basnijholt/holoviews,ioam/holoviews,vascotenner/holoviews,ioam/holoviews