### Godot version

v4.1.stable.official [970459615]  < Steam

### System information

Godot v4.1.stable - Debian GNU/Linux trixie/sid trixie - Vulkan (Mobile) - dedicated NVIDIA GeForce GTX 1060 (nvidia) - Intel(R) Core(TM) i5-8400 CPU @ 2.80GHz (6 Threads)

### Issue description

After Godot got upgraded 4.0 -> 4.1, when opening a project from the earlier version, I noticed that the buttons in the confirmation dialog look a bit squiffy:

![Screenshot_20230706_123457](https://github.com/godotengine/godot/assets/441188/eb5dc8e3-9941-4cac-8cb8-17167d1f33bf)

(Somewhat aside, but that dialog should probably be able to deduce and be more precise about whether it's an upgrade or downgrade!)

### Steps to reproduce

1. Have a project from Godot 4.0
2. Upgrade Godot to 4.1
3. Open project manager

Alternatively:
1. Create a new project in 4.1
2. Quit Godot
3. Edit the `project.godot`'s `config/features` to read `4.0` instead of `4.1`
4. Open project manager

### Minimal reproduction project

[default.zip](https://github.com/godotengine/godot/files/11967512/default.zip)

virtual void cancel_pressed() {}
	virtual void custom_action(const String &) {}
	
	void _text_submitted(const String &p_text);
	void _ok_pressed();
	void _cancel_pressed();
public:
	Label *get_label() { return message_label; }
	static void set_swap_cancel_ok(bool p_swap);
	void register_text_enter(Control *p_line_edit);
	Button *get_ok_button() { return ok_button; }
	Button *add_button(const String &p_text, bool p_right = false, const String &p_action = "");
	Button *add_cancel_button(const String &p_cancel = "");
	void remove_button(Control *p_button);
	void set_hide_on_ok(bool p_hide);
	bool get_hide_on_ok() const;
	void set_close_on_escape(bool p_enable);
	bool get_close_on_escape() const;
	void set_text(String p_text);
	String get_text() const;
	void set_autowrap(bool p_autowrap);
	bool has_autowrap();
	void set_ok_button_text(String p_ok_button_text);
	String get_ok_button_text() const;
	AcceptDialog();
	~AcceptDialog();
};
class ConfirmationDialog : public AcceptDialog {