### 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)

_update_size_hints(p_window);
	
	XResizeWindow(x11_display, wd.x11_window, size.x, size.y);
	for (int timeout = 0; timeout < 50; ++timeout) {
		XSync(x11_display, False);
		XGetWindowAttributes(x11_display, wd.x11_window, &xwa);
		if (old_w != xwa.width || old_h != xwa.height) {
			break;
		}
		usleep(10000);
	}
	
#if defined(VULKAN_ENABLED)
	if (context_vulkan) {
		context_vulkan->window_resize(p_window, xwa.width, xwa.height);
	}
#endif
#if defined(GLES3_ENABLED)
	if (gl_manager) {
		gl_manager->window_resize(p_window, xwa.width, xwa.height);
	}
#endif
}
Size2i DisplayServerX11::window_get_size(WindowID p_window) const {
	_THREAD_SAFE_METHOD_
	ERR_FAIL_COND_V(!windows.has(p_window), Size2i());
	const WindowData &wd = windows[p_window];
	return wd.size;
}
Size2i DisplayServerX11::window_get_size_with_decorations(WindowID p_window) const {