timetracker/games/templates/add_purchase.html

<c-layouts.add>
<c-slot name="additional_row">
<tr>
    <td></td>
    <td>
        <input type="submit"
               name="submit_and_redirect"
               value="Submit & Create Session" />
    </td>
</tr>
</c-slot>
</c-layouts.add>