### 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)

return st_args;
}
Control::TextDirection RichTextLabel::get_text_direction() const {
	return text_direction;
}
void RichTextLabel::set_language(const String &p_language) {
	if (language != p_language) {
		_stop_thread();
		language = p_language;
		main->first_invalid_line.store(0); 
		_validate_line_caches();
		queue_redraw();
	}
}
String RichTextLabel::get_language() const {
	return language;
}
void RichTextLabel::set_autowrap_mode(TextServer::AutowrapMode p_mode) {
	if (autowrap_mode != p_mode) {
		_stop_thread();
		autowrap_mode = p_mode;
		main->first_invalid_line = 0; 
		_validate_line_caches();
		queue_redraw();
	}
}
TextServer::AutowrapMode RichTextLabel::get_autowrap_mode() const {