### 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)

}
	}
	mouse_mode = p_mode;
	if (mouse_mode == MOUSE_MODE_CAPTURED || mouse_mode == MOUSE_MODE_CONFINED || mouse_mode == MOUSE_MODE_CONFINED_HIDDEN) {
		
		_flush_mouse_motion();
		WindowID window_id = _get_focused_window_or_popup();
		if (!windows.has(window_id)) {
			window_id = MAIN_WINDOW_ID;
		}
		WindowData &window = windows[window_id];
		if (XGrabPointer(
					x11_display, window.x11_window, True,
					ButtonPressMask | ButtonReleaseMask | PointerMotionMask,
					GrabModeAsync, GrabModeAsync, window.x11_window, None, CurrentTime) != GrabSuccess) {
			ERR_PRINT("NO GRAB");
		}
		if (mouse_mode == MOUSE_MODE_CAPTURED) {
			center.x = window.size.width / 2;
			center.y = window.size.height / 2;
			XWarpPointer(x11_display, None, window.x11_window,
					0, 0, 0, 0, (int)center.x, (int)center.y);
			Input::get_singleton()->set_mouse_position(center);
		}
	} else {
		do_mouse_warp = false;
	}
	XFlush(x11_display);
}
DisplayServerX11::MouseMode DisplayServerX11::mouse_get_mode() const {