Hotkey for toggling CW does not work when grouped notifications are enabled

[ClearlyClaire]

Issue introduced by #2791

Steps to reproduce the problem

1. Enable grouped notifications
2. Receive a mention with a CW
3. Press “x” when the post is selected

Expected behaviour

CW state should toggle

Actual behaviour

CW state does not toggle

Detailed description

The issue is not present when the “Show/hide content of all copies at once” setting is enabled.

This is because, when this setting is not enabled, the CW state is handled by the Status component, which in our case is a descendant of the NotificationWithStatus component, which is the one handling the hotkey.