Require reason to close thread

[misplacedyank]

Is your feature request related to a problem? Please elaborate.

Mods are able to close ModMail thread without providing justification/reason and it's frustrating for a user experience.

Describe the solution you'd like

Would love to be able to require a reason when closing ModMail threads for mods.

Does your solution involve any of the following?

• [ ] Logviewer
• [x] New config option

Describe alternatives you've considered

We've asked mods to please remember to always provide a reason but sometimes they forget.

Who will this benefit?

This benefits me as admin so I can spot check that mods are using ModMail correctly and closing DMs appropriately and it benefits the end user as they receive a response.

Additional Information

No response