Similar to the visual encodings for "background" / filter-included-but-select-excluded data points, we can also specify visual encodings for highlighting data points, via both layer params and implementing the shader/rendering logic.
Follow-up from #297
Similar to the visual encodings for "background" / filter-included-but-select-excluded data points, we can also specify visual encodings for highlighting data points, via both layer params and implementing the shader/rendering logic.
Follow-up from #297