### 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)

Item *item = p_item;
	while (item) {
		if (item->type == ITEM_UNDERLINE) {
			return true;
		}
		item = item->parent;
	}
	return false;
}
bool RichTextLabel::_find_strikethrough(Item *p_item) {
	Item *item = p_item;
	while (item) {
		if (item->type == ITEM_STRIKETHROUGH) {
			return true;
		}
		item = item->parent;
	}
	return false;
}
void RichTextLabel::_fetch_item_fx_stack(Item *p_item, Vector<ItemFX *> &r_stack) {
	Item *item = p_item;
	while (item) {
		if (item->type == ITEM_CUSTOMFX || item->type == ITEM_SHAKE || item->type == ITEM_WAVE || item->type == ITEM_TORNADO || item->type == ITEM_RAINBOW || item->type == ITEM_PULSE) {
			r_stack.push_back(static_cast<ItemFX *>(item));
		}
		item = item->parent;
	}
}
void RichTextLabel::_normalize_subtags(Vector<String> &subtags) {