Notification Settings imroved stucture

### Your use case

#### What would you like to do?

Tweak the design sructure of notification settings

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

Its slightly confusing / not consistent right now

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

Current structure:

- Notify on:
- Group Chats
- dm
- Mentions
- Notify on @room
- Additional Settings
- Notify on invatations

Proposed structure:
- Group Chats
- DM
- Notify on:
- @room
- invatations

### Have you considered any alternatives?

-

### Additional context

_No response_

### Are you willing to provide a PR?

No