Merge pull request #2922 from uxen-ab/issue-2749-template-editing

Fixes the template editing as it was done in pull #2866 for creation.

resources/views/dashboard/templates/edit.blade.php

@@ -9,13 +9,14 @@
 <script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.8.0/mode/twig/twig.min.js"></script>
 
 <script>
-(function() {
+//Initializes the editor only once the DOM is loaded.
+window.addEventListener("DOMContentLoaded", function(e) {
      var editor = CodeMirror.fromTextArea(document.getElementById('cm-editor'), {
          lineNumbers: true,
          mode: 'twig',
          lineWrapping: true
      });
-}());
+});
 </script>
 @stop