Make ggplotly respect override.aes in guide_legend

A short example:

library(ggplot2)
p <- ggplot(economics_long, aes(date, value01, colour = variable)) +
  geom_line(size = .5) + 
  guides(colour = guide_legend(override.aes = list(size = 2)))
p

Notice the thicker lines in the legend on the right

However, this new element is ignored in ggplotly:

ggplotly(p)

This becomes even more critical when using a very low level of alpha, and then needing to adjust it for the legend.

Thanks.

首先运行使用 ggplot2 和 ggplotly(p) 的 R 示例，比较 ggplot2 图例和交互式图例的结果。跟踪 ggplotly 图例转换的入口点，并验证 guide_legend 的 override.aes 值（包括 size 和 alpha）会影响渲染后的图例。