### 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
}
		}
	}
	if (oc->line_point_count != lines.size() && oc->vertex_array != 0) {
		glDeleteVertexArrays(1, &oc->vertex_array);
		GLES3::Utilities::get_singleton()->buffer_free_data(oc->vertex_buffer);
		GLES3::Utilities::get_singleton()->buffer_free_data(oc->index_buffer);
		oc->vertex_array = 0;
		oc->vertex_buffer = 0;
		oc->index_buffer = 0;
	}
	if (lines.size()) {
		Vector<uint8_t> geometry;
		Vector<uint8_t> indices;
		int lc = lines.size();
		geometry.resize(lc * 6 * sizeof(float));
		indices.resize(lc * 3 * sizeof(uint16_t));
		{
			uint8_t *vw = geometry.ptrw();
			float *vwptr = reinterpret_cast<float *>(vw);
			uint8_t *iw = indices.ptrw();
			uint16_t *iwptr = (uint16_t *)iw;
			const Vector2 *lr = lines.ptr();
			const int POLY_HEIGHT = 16384;
			for (int i = 0; i < lc / 2; i++) {
				vwptr[i * 12 + 0] = lr[i * 2 + 0].x;
				vwptr[i * 12 + 1] = lr[i * 2 + 0].y;
				vwptr[i * 12 + 2] = POLY_HEIGHT;
				vwptr[i * 12 + 3] = lr[i * 2 + 1].x;
				vwptr[i * 12 + 4] = lr[i * 2 + 1].y;