… sidebar

…ed (if any), which makes bookmarking the exact state of the sidebar trivial.

* Better shown/hidden mechanic for Shiny inputs inside collapsible menuItems.

…css transitions look reasonable when its content is initially empty (use case is for hidden Shiny outputs that are not rendered until the first time the menuItem is expanded and reveal them -- i.e. first time that trigger("shown") is called)

…appen on the sidebar

…d animation when `disable = TRUE` inside dashboardSidebar()