Merge pull request #2508 from HyphaApp/bug/richtext-2

Use Invalid elements attribute of tinymce to validate input

hypha/apply/utils/options.py

@@ -21,6 +21,7 @@ MCE_ATTRIBUTES = {
     'relative_urls': False,
     'browser_spellcheck': True,
     'default_link_target': '_blank',
+    'invalid_elements': 'iframe,object,embed'
 }
 MCE_ATTRIBUTES_SHORT = {**MCE_ATTRIBUTES, **{'height': 180}}