Change scatterplot formatting so that regression lines are (de-)emphasized the same as the series

Butters

Currently, in a (data science) scatterplot, trendlines do not filter when hover-filtering on a series

It seems natural to think that hovering over a series emphasize it (grey out the other series') would have the same effect on the trendlines, but it does not.

According to Domo's developers, this is by design, and "expected with how the chart is currently built."
I believe that both the scatterplots and trendlines should react the same to ephasis/deemphasis.

Attached is the current state, and my proposed state.