Page crashes when viewing comment from a deleted user in CP

[tamlyn]

Description

Twig\Error\RuntimeError: Impossible to access an attribute ("cpEditUrl") on a null variable. 
in /app/vendor/verbb/comments/src/templates/comments/_edit.html:134

Steps to reproduce

1. Create a user
2. Add a comment as that user
3. Delete that user
4. The comment is shown in the control panel comment view as being by [Deleted User]
5. Click to view the comment
6. 💥

Additional info

• Plugin version: 1.8.5
• Craft version: 3.6.10
• Multi-site: No

Additional context

[engram-design]

Fixed in 1.8.6