New feature request: a modeBarButtonsToKeep argument in the config function

Currently plotly has a function to remove listed mode bar buttons.

It'd be nice if it had a function to keep listed mode bar buttons, and to drop the rest.

Otherwise the code is quite long-winded if a user only wants to keep one button, such as the camera.

This argument could be called modeBarButtonsToKeep

library(dplyr)
library(ggplot2)

plot <- ggplot(iris) +
  geom_point(aes(Sepal.Width, Sepal.Length))

plotly::ggplotly(plot) %>% 
  plotly::config(modeBarButtonsToRemove = list("zoom2d", "pan2d", "zoomIn2d", "zoomOut2d", 
"autoScale2d","resetScale2d", "hoverClosestCartesian", "hoverCompareCartesian", 
"sendDataToCloud", "toggleHover", "resetViews", "toggleSpikelines", "resetViewMapbox", 
"toggleSpikelines", "resetViewMapbox", "lasso2d", "select2d"))

リポジトリで plotly::config と、既存の modeBarButtonsToRemove の処理を検索します。設定がモードバーに到達するまでの流れを追い、modeBarButtonsToKeep 引数によって指定されたボタンだけが保持されることを確認します。この issue では、実行するファイルやテストは指定されていません。