title: Tabulator : Use confirmation to check if a cell is editable
body: <p>I am using tabulator v 4.4.3 and I am trying to use a confirm message within the cell editable validation. However it does not let me edit irrespective of the return value.</p>
  <pre class="lang-js prettyprint-override"><code>{
      title:&quot;lblNoRms&quot;, 
      field:&quot;noRooms&quot;, 
      align:&quot;center&quot;,
      editor:&quot;number&quot;,
      editable:function(cell){
          let row = cell.getRow();
          let ids = row._row.data.ids;
  
          if (ids !== []){
              return  confirm(&quot;do you want to edit ?&quot;);
          }else{
              return true;
          }
      },
  },
  </code></pre>