Update markup of templates to Bootstrap 5 (#173)

* Update markup of all buttons, forms and input elements to Bootstrap 4

* Add documentByLine in the card-header. Add commentBody in the card-body

* Update CHANGES.txt

* Update @@manage-comments.pt moderation interface with Bootstrap 4

* bs5 form updates

* add bootstrap icon from resolver

* update bindings for button

* update markup for bootstrap 5

* turn configlet portlets into menu

* turn configlet portlets into menu (2)

* bootstrap b1 changes

* major version bump

Co-authored-by: Peter Holzer <peter.holzer@agitator.com>
Co-authored-by: Jens W. Klein <jk@kleinundpartner.at>
Co-authored-by: Peter Mathis <peter.mathis@kombinat.at>

plone/app/discussion/browser/comments.py

@@ -140,9 +140,9 @@ class CommentForm(extensible.ExtensibleForm, form.Form):
 
     def updateActions(self):
         super(CommentForm, self).updateActions()
-        self.actions['cancel'].addClass('standalone')
+        self.actions['cancel'].addClass('btn btn-secondary')
         self.actions['cancel'].addClass('hide')
-        self.actions['comment'].addClass('context')
+        self.actions['comment'].addClass('btn btn-primary')
 
     def get_author(self, data):
         context = aq_inner(self.context)