Customize the edit toolbar for addDrawToolbar
Usage
edittoolbarOptions(
actions = list(save = list(title = "Save changes", text = "Save"), cancel = list(title
= "Cancel editing, discards all changes", text = "Cancel"), clearAll = list(title =
"Clear all layers", text = "Clear All")),
buttons = list(edit = "Edit layers", editDisabled = "No layers to edit", remove =
"Delete layers", removeDisabled = "No layers to delete")
)