Feature request: new option in addGroupedLayersControl()

[aloboa]

Using addGroupedLayersControl(), I can set the current groupedLayersControlOptions()
in this way:

options = groupedLayersControlOptions(groupCheckboxes = TRUE,
                                        collapsed = FALSE,
                                        autoZIndex = TRUE,
                                        groupsCollapsable = FALSE,
                                        sortLayers = FALSE,
                                        sortGroups = FALSE,
                                        sortBaseLayers = FALSE,
                                        exclusiveGroups = "Miscelanea")) %>%

and get:

or:

options = groupedLayersControlOptions(groupCheckboxes = TRUE,
                                        collapsed = FALSE,
                                        autoZIndex = TRUE,
                                        groupsCollapsable = TRUE,
                                        sortLayers = FALSE,
                                        sortGroups = FALSE,
                                        sortBaseLayers = FALSE,
                                        exclusiveGroups = "Miscelanea")) %>%

and get:

But what I would like the user to see when opening the map is:

which seems to me that would require an additional option "groupsCollapsed=FALSE"

[trafficonese]

Unfortunately this is currently not supported in the underlying JS library.
I will have to see how to include it there