### 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)

Button *button = memnew(Button);
	button->set_text(p_text);
	if (p_right) {
		buttons_hbox->add_child(button);
		buttons_hbox->add_spacer();
	} else {
		buttons_hbox->add_child(button);
		buttons_hbox->move_child(button, 0);
		buttons_hbox->add_spacer(true);
	}
	child_controls_changed();
	if (is_visible()) {
		_update_child_rects();
	}
	if (!p_action.is_empty()) {
		button->connect("pressed", callable_mp(this, &AcceptDialog::_custom_action).bind(p_action));
	}
	return button;
}
Button *AcceptDialog::add_cancel_button(const String &p_cancel) {
	String c = p_cancel;
	if (p_cancel.is_empty()) {
		c = "Cancel";
	}
	Button *b = swap_cancel_ok ? add_button(c, true) : add_button(c);
	b->connect("pressed", callable_mp(this, &AcceptDialog::_cancel_pressed));
	return b;
}
void AcceptDialog::remove_button(Control *p_button) {