### Godot version

v4.0.beta15.mono.official [4fa6edc88]

### System information

Linux, Xorg

### Issue description

The entire window loses focus if you ungrab focus from a Control. 
This doesn't seem to happen in Beta 14 and older betas.

### Steps to reproduce

1. Create a Control that can grab focus (tested with LineEdit and TextEdit)
2. Grab focus
3. Release focus via release_focus() or hiding the node

### Minimal reproduction project

[FocusMinimal.zip](https://github.com/godotengine/godot/files/10498175/FocusMinimal.zip)

while (!events_thread_done.is_set()) {
		_wait_for_events();
		
		{
			MutexLock mutex_lock(events_mutex);
			_check_pending_events(polled_events);
		}
	}
}
void DisplayServerX11::_check_pending_events(LocalVector<XEvent> &r_events) {