Fixed handling of styles in LabelledData.__setstate__
Fixed handling of styles in LabelledData.__setstate__

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