markersize do not create a legend

[diegozea]

Hi!

I have just noticed that markersize does not create a legend.

Code example:

using RDatasets, AlgebraOfGraphics, CairoMakie
set_aog_theme!()
iris = dataset("datasets", "iris")
plt = data(iris) * mapping(:PetalWidth, :PetalLength, markersize=:SepalLength) * visual(Scatter)
draw(plt)

Cheers,