### 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 (XCheckIfEvent(x11_display, &ev, _predicate_clipboard_save_targets, (XPointer)&x11_window)) {
			switch (ev.type) {
				case SelectionRequest:
					_handle_selection_request_event(&(ev.xselectionrequest));
					break;
				case SelectionNotify: {
					if (ev.xselection.target == save_targets) {
						
						return;
					}
					break;
				}
			}
		}
	}
}
int DisplayServerX11::get_screen_count() const {
	_THREAD_SAFE_METHOD_
	int count = 0;
	
	int event_base, error_base;
	if (XineramaQueryExtension(x11_display, &event_base, &error_base)) {
		XineramaScreenInfo *xsi = XineramaQueryScreens(x11_display, &count);
		XFree(xsi);
	} else {
		count = XScreenCount(x11_display);
	}
	return count;
}
int DisplayServerX11::get_primary_screen() const {