Delete and edit comments on closed node
Submitted by clemens on Tue, 2015/02/17 - 4:29pm
Having a forum you needs quick deletions of improper comments.
In Drupal 7 and Drupal 8 you have to visit admin/content/comments to do so. But then you loose the thread.
You could review and use this patch or add this to your custom module. The first needs review and testing. The later needs a Drupal coder.