CodeMirror with constructor

# Summernote with CodeMirror

https://summernote.org/examples/#codemirror-as-codeview

<p>Seasons <b>coming up</b></p>

        $(document).ready(function() {
          $('.summernote').summernote({
            height: 200,
            tabsize: 2,
            codemirror: {
              CodeMirrorConstructor: window.CodeMirror,
              mode: 'text/html',
              htmlMode: true,
              lineNumbers: true,
              theme: 'monokai'
            }
          });
        });