MDL-61189 editor_tinymce: save data before submitting

lib/editor/tinymce/module.js

@@ -80,6 +80,16 @@ M.editor_tinymce.init_editor = function(Y, editorid, options) {
             });
         };
     }
+
+    // Retain any setup which is already defined.
+    options.originalSetupFunction = options.setup || function(){};
+    options.setup = function(editor) {
+        options.originalSetupFunction();
+        editor.onChange.add(function(ed) {
+            ed.save();
+        });
+    };
+
     tinyMCE.init(options);
 
     var item = document.getElementById(editorid+'_filemanager');