How to combine top navigation (navbarPage) and a sidebar menu (sidebarMenu) in shiny

Question

I have a shiny app (using navbarPage) with many tabs and would like to add a sidebarMenu that can be seen no matter which tab is selected. The input values in the sidebar have a

Answer 1

There is now an easier and more elegant way to do achieve it:

shinydashboardPlus

and here to see it in action.