### 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)

_THREAD_SAFE_METHOD_
#ifdef DISPLAY_SERVER_X11_DEBUG_LOGS_ENABLED
	static int frame = 0;
	++frame;
#endif
	bool ignore_events = mouse_process_popups();
	if (app_focused) {
		
		bool focus_found = false;
		for (const KeyValue<WindowID, WindowData> &E : windows) {
			if (E.value.focused) {
				focus_found = true;
				break;
			}
		}
		if (!focus_found) {
			uint64_t delta = OS::get_singleton()->get_ticks_msec() - time_since_no_focus;
			if (delta > 250) {
				
				if (OS::get_singleton()->get_main_loop()) {
					DEBUG_LOG_X11("All focus lost, triggering NOTIFICATION_APPLICATION_FOCUS_OUT\n");
					OS::get_singleton()->get_main_loop()->notification(MainLoop::NOTIFICATION_APPLICATION_FOCUS_OUT);
				}
				app_focused = false;