title: Insert custom button on Insert/Edit Link dialog?
body: <p>I want to add a custom button on the Insert/Edit Link dialog/popup in tinymce v5.</p>
  
  <p>I only got this code for the setup option where I put in call to a function.</p>
  
  <pre><code>function tinyMceEditLink(editor) {
      console.log("tinyMceEditLink");
  
      editor.on("click", function(e) {
          console.log("this click");
      });
  }
  </code></pre>