### Godot version

v4.0.2.stable.official [7a0977c]

### System information

Window 10

### Issue description

If your project is set to `WINDOW_MODE_FULLSCREEN` in project settings, the first time you try to switch mode for `WINDOWED`, it will not switch properly.


### Steps to reproduce

1. Create a new project
2. Change project settings `Display > Window > Mode` for `FullScreen`
3. Run the following code :

Code that reproduce the issue:
```
func _ready():
	DisplayServer.window_set_mode(DisplayServer.WINDOW_MODE_WINDOWED)
	DisplayServer.window_set_size(Vector2i(800,600))
``` 

## Workaround
Calling the `window_set_mode` twice solve the issue...

```
func _ready():
	DisplayServer.window_set_mode(DisplayServer.WINDOW_MODE_WINDOWED)
	DisplayServer.window_set_mode(DisplayServer.WINDOW_MODE_WINDOWED)
	DisplayServer.window_set_size(Vector2i(800,600))
``` 


### Minimal reproduction project

N/A: reproduction steps are trivial
DisplayServerWindows *ds_win = static_cast<DisplayServerWindows *>(DisplayServer::get_singleton());
	if (ds_win) {
		return ds_win->MouseProc(code, wParam, lParam);
	} else {
		return ::CallNextHookEx(nullptr, code, wParam, lParam);
	}
}
DisplayServer::WindowID DisplayServerWindows::window_get_active_popup() const {
	const List<WindowID>::Element *E = popup_list.back();
	if (E) {
		return E->get();
	} else {
		return INVALID_WINDOW_ID;
	}
}
void DisplayServerWindows::window_set_popup_safe_rect(WindowID p_window, const Rect2i &p_rect) {
	_THREAD_SAFE_METHOD_
	ERR_FAIL_COND(!windows.has(p_window));
	WindowData &wd = windows[p_window];
	wd.parent_safe_rect = p_rect;
}
Rect2i DisplayServerWindows::window_get_popup_safe_rect(WindowID p_window) const {
	_THREAD_SAFE_METHOD_
	ERR_FAIL_COND_V(!windows.has(p_window), Rect2i());
	const WindowData &wd = windows[p_window];
	return wd.parent_safe_rect;
}
void DisplayServerWindows::popup_open(WindowID p_window) {