title: Having issue using max_width using inyMCE 5
body: <p>I have been trying to set the maximum width so that the editor is not so big but it does not seem to work.
  I am using TINYMCE 5 direct from tinymce CDN</p>
  <p>I am using max_width: 500,but it does not seem to limit it to 500px, I tried changing it to 500px but still does not work. The example in the online documentation dont use px</p>
  
  tinymce.init({
  
      selector: 'textarea.mceEditor',
      max_width: 500,
      
      menubar: false,
      branding: false,
      
      resize: 'both',