title: Add new special character in tinymce charmap
body: <p>I am using tinymce editor for my project. I want to add some more special characters (for eg Rupee sign (&#8377;)). However I didn't find any solution.</p>
  
  <p>My code is </p>
  
  <pre><code>tinymce.init({
              "selector": "#editor",
              "menubar":false,
              "statusbar": false,
              "plugins": "charmap",
              "toolbar": "bold italic underline | charmap"
  })
  </code></pre>
  
  <p>Any help would be appreciated</p>