title: bottom alignment of two side-by-side wellpanels in Shiny
body: <p>I'm trying to code a shiny layout with 2 horizontal well Panels, one on the right one on the left, but the one on the right should be composed of 2 vertical well Panels itself.</p>
  
  <p>I can't make them align at the bottom. Is that possible? 
  My simplified app below. I tried to add a fluidrow to put them both, but it doesn't change anything. </p>
  
  <pre><code>ui &lt;- tagList( navbarPage(id="navbar", title="title",
                            tabPanel(title="Home",
                                     titlePanel(title="Welcome"),
                                     column(6,
                                            wellPanel(
                                                 h2("Hello World"),
                                                 br(),
                                                 h4("some text"))),
                                     column(6,
                                            fluidRow(
                                                 wellPanel(
                                                      h2("News"),
                                                      br(),
                                                      h4("Some other text"),
                                                      br(),
                                                      fluidRow(column(6, 
                                                                      h5("Some info:")),
                                                               column(6, 
                                                                      div(actionButton("button", "button"), style="float:right") 
                                                               )))),
                                            fluidRow(
                                                 wellPanel(div(img(src="https://cran.r-project.org/Rlogo.svg", width=100), style="text-align: center;")
                                                 )))),
                            tabPanel(title="anothertabl", value="anothertabl"))
  )
  server=function(input, output, session){}
  shinyApp(ui, server)
  </code></pre>
  
  <p>It should look like this, with both wellPanels automatically adapting to the longest one
  <a href="https://i.stack.imgur.com/kmTA2.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/kmTA2.png" alt="enter image description here"></a></p>