title: Disable datatables when processing
body: <p>I'm using datatables with processing message but I would like to block datatable when this message show up. This is important because otherwise the user may use an old row.
  This is my configuration:</p>
  
  <pre><code>datatableTable = $('#datatableTable').DataTable({
              responsive: true,
              "bLengthChange": false,
              deferRender:    true,
              scrollY:        '60vh',
              scrollCollapse: true,
              scroller:       true,
              "bProcessing": true,
  </code></pre>
  
  <p>and I'm using this message css:</p>
  
  <pre><code>div.dataTables_wrapper div.dataTables_processing {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 200px;
    margin-left: -100px;
    margin-top: -26px;
    text-align: center;
    padding: 1em 0;
    z-index: 9999;
  }
  </code></pre>
  
  <p>Is there a way to block datatable? thanks</p>