Chatbot: Historical chats should be rendered with markdown when selected

I provided a patch to fix the issue.

Tested, reviewed and merged with dev - thanks @ayrmax

Automatically closed - issue fixed for 2 weeks with no activity.

We are doing some issue management housekeeping and adding/removing components.

We are removing the "Other Submodules" component and want people to categorize issues with the best module/submodule component.

Moving this issue to "AI Chatbot".

See 📌 Update AI module project components Active for more details.