title: Remove 'search' option but leave 'search columns' option
body: <p>I would like to remove 'global search' option from my application, but leave 'column search' option. Any ideas? I've tried different paramethers like <code>searching=FALSE, filtering='none'</code>... None of this works properly. </p>
  
  <p>My code:</p>
  
  <p><code>server.R:</code></p>
  
  <pre><code>library("shiny")
  library("DT")
  
  data(iris)
  
  shinyServer(function(input, output) {
  
      output$tabelka &lt;- DT::renderDataTable({
  
          datatable(iris, filter="top", selection="multiple", escape=FALSE)
  
      })
  
  })
  </code></pre>
  
  <p><code>ui.R</code></p>
  
  <pre><code>library("shiny")
  library("DT")
  
  shinyUI(fluidPage(
  
      DT::dataTableOutput("tabelka")
  
  ))
  </code></pre>
  
  <p>And picture which helps to understand my problem:</p>
  
  <p><a href="https://i.stack.imgur.com/B2Map.png" rel="noreferrer"><img src="https://i.stack.imgur.com/B2Map.png" alt="enter image description here"></a></p>