Use JS to resize cached plots

[statnmap]

• tosize allows to change style of a specific div
• resize resises the windows to allow shiny take into account new div sizes

Use for instance as follows:

observeEvent(input$graph_size, {
     session$sendCustomMessage("tosize", list(id = glue::glue("{ns('plot')}"), size = input$graph_size))
     session$sendCustomMessage("resize", glue::glue("resize {ns('plot')}"))
})

[ColinFay]

On hold for now

[ColinFay]

Thanks.

I don't think we'll be adding internal functions to golem JS, so I'm closing this for now.

See discussion in #503