Allow automatic sections to be disabled on a per space basis

### Your use case

#### What would you like to do?

I'd like to be able to disable some automatic builtin sections like "Chats" or "Low Priority" in some spaces, specifically in the "Home" space.

#### Why would you like to do it?

To remove clutter from my default view.

#### How would you like to achieve it?

See above.

### Have you considered any alternatives?

_No response_

### Additional context

_No response_

Start by locating the code that creates the automatic built-in sections, including Chats and Low Priority, and the entry points for per-space settings. The change is complete when those sections can be disabled independently in a space such as Home, while remaining available where they are enabled.

Written by the indexing model from the issue text.