Minor fix for bokeh legends
Minor fix for bokeh legends

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