`wtp = list()` argument in `ceplane.plot()` for base R version

[n8thangreen]

This functionality is enabled for the {ggplot2} version already.

[n8thangreen]

So this is to be able to change the line width, colour etc as well as just the value.

BCEA/R/ceplane_plot_graph.R

Line 75 in 882696d

ceplane_base_params(he, wtp, graph_params)