title: Tinymce allow tab space indent
body: <p>I want to add constant tab space indent when user press TAB.</p>
  
  <pre><code>tinyMCE.init({
      selector: 'textarea',
      indentation : '60pt',
      plugins: 'textcolor print preview importcss searchreplace autolink autosave save directionality visualblocks visualchars fullscreen image link media template codesample table charmap hr pagebreak nonbreaking anchor toc insertdatetime advlist lists wordcount imagetools textpattern noneditable',
      paste_as_text:true,
      //menubar: false,
      toolbar: 'bold italic underline strikethrough superscript subscript | fontselect fontsizeselect | alignleft aligncenter alignright alignjustify | outdent indent |  numlist bullist checklist | forecolor backcolor',
      //nonbreaking_force_tab: true,
      setup : function(ed) {
          ed.on('keydown', function(e) {
  
  
              //
  
              //
  
  
            });
      },
  
  });
  </code></pre>