### Godot version

4.0.rc6.mono.official

### System information

macOS 12.0.1

### Issue description

Just a minor visual issue.

When opening an empty directory the focus highlight is drawn incorrectly. It looks like the UI is drawing a smaller rectangle within the main rect:
<img width="1058" alt="Bildschirmfoto 2023-02-28 um 14 13 31" src="https://user-images.githubusercontent.com/11627131/221868794-7450606d-e758-4104-8f33-182d9779d7f8.png">


This behavior also changes when you hover over other items in the view, so I'm not sure if this a general issue with the focus highlighting or just an issue in the directory view:
<img width="1052" alt="Bildschirmfoto 2023-02-28 um 14 32 54" src="https://user-images.githubusercontent.com/11627131/221869308-4756f26e-cda2-4057-be1e-7439030895dc.png">


### Steps to reproduce

1. New Project
2. Browse
3. Create Folder
4. Click or Tab to set focus on the empty directory view

### Minimal reproduction project

N/A
}
	bool lights_disabled = light_count == 0 && !state.using_directional_lights;
	if (lights_disabled != state.canvas_instance_batches[state.current_batch_index].lights_disabled) {
		_new_batch(r_batch_broken);
		state.canvas_instance_batches[state.current_batch_index].lights_disabled = lights_disabled;
	}
	const Item::Command *c = p_item->commands;
	while (c) {
		if (skipping && c->type != Item::Command::TYPE_ANIMATION_SLICE) {
			c = c->next;
			continue;
		}
		if (c->type != Item::Command::TYPE_MESH) {
			
			_update_transform_2d_to_mat2x3(base_transform * draw_transform, state.instance_data_array[r_index].world);
		}
		
		for (int i = 0; i < 4; i++) {
			state.instance_data_array[r_index].modulation[i] = 0.0;
			state.instance_data_array[r_index].ninepatch_margins[i] = 0.0;
			state.instance_data_array[r_index].src_rect[i] = 0.0;
			state.instance_data_array[r_index].dst_rect[i] = 0.0;
			state.instance_data_array[r_index].lights[i] = uint32_t(0);
		}
		state.instance_data_array[r_index].color_texture_pixel_size[0] = 0.0;
		state.instance_data_array[r_index].color_texture_pixel_size[1] = 0.0;
		state.instance_data_array[r_index].pad[0] = 0.0;
		state.instance_data_array[r_index].pad[1] = 0.0;
		state.instance_data_array[r_index].lights[0] = lights[0];
		state.instance_data_array[r_index].lights[1] = lights[1];