Rooms don't show as unread when threads which I participate in have new messages

### Steps to reproduce

You will need 2 users, including yourself.

1. As your opponent, send a message.
2. As you, create a thread from that message. Click away to another room after.
3. As your opponent, send a message on that thread.
4. As you, note the room doesn't appear as unread (but the message preview updates)

### Outcome

#### What did you expect?

The room should be marked as unread: this is a thread I care about and should receive blocking notifications for.

#### What happened instead?

Nothing :D

### Operating system

Windows 11

### Application version

Element Nightly version: 0.0.1-nightly.2024051401 Crypto version: Rust SDK 0.7.0 (61b175b), Vodozemac 0.5.1

### How did you install the app?

The Internet

### Homeserver

t2l.io

### Will you send logs?

Yes