### Godot version

v4.1.stable.official [970459615]

### System information

Godot v4.1.stable - Windows 10.0.22621 - Vulkan (Forward+) - dedicated NVIDIA GeForce MX330 (NVIDIA; 30.0.15.1169) - 11th Gen Intel(R) Core(TM) i5-1135G7 @ 2.40GHz (8 Threads)

### Issue description

Calling `RichTextLabel`'s `select_all` method has no visual indicator, but it must have one. 

### Steps to reproduce

- Add `RichTextLabel` node
- Set `selection_enabled` value to be `true`
- Call `$RichTextLabel.select_all() `method in `_ready`

### Minimal reproduction project

[RichTextLabel_bug.zip](https://github.com/godotengine/godot/files/12098913/RichTextLabel_bug.zip)

if (text == p_bbcode) {
		return;
	}
	text = p_bbcode;
	_apply_translation();
}
void RichTextLabel::_apply_translation() {
	String xl_text = atr(text);
	if (use_bbcode) {
		parse_bbcode(xl_text);
	} else { 
		clear();
		add_text(xl_text);
	}
}
String RichTextLabel::get_text() const {
	return text;
}
void RichTextLabel::set_use_bbcode(bool p_enable) {
	if (use_bbcode == p_enable) {
		return;
	}
	use_bbcode = p_enable;
	notify_property_list_changed();
	_apply_translation();
}
bool RichTextLabel::is_using_bbcode() const {