The `focusQuestion` function should select the first row within a matrix. In the meantime, a matrix has no focus indication. [View Demo](https://plnkr.co/edit/78j1zPndwrxfd8cv) <img width="731" height="424" alt="Image" src="https://github.com/user-attachments/assets/53f7a724-5232-4c0c-a5ef-d30e9e0cb1d3" />