### 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)

_stop_thread();
	MutexLock data_lock(data_mutex);
	if (current->type == ITEM_TABLE) {
		return;
	}
	ERR_FAIL_COND(p_image.is_null());
	ERR_FAIL_COND(p_image->get_width() == 0);
	ERR_FAIL_COND(p_image->get_height() == 0);
	ItemImage *item = memnew(ItemImage);
	if (p_region.has_area()) {
		Ref<AtlasTexture> atlas_tex = memnew(AtlasTexture);
		atlas_tex->set_atlas(p_image);
		atlas_tex->set_region(p_region);
		item->image = atlas_tex;
	} else {
		item->image = p_image;
	}
	item->color = p_color;
	item->inline_align = p_alignment;
	if (p_width > 0) {
		
		item->size.width = p_width;
		if (p_height > 0) {
			
			item->size.height = p_height;
		} else {