$def with (filter_tabs, category_tabs)
<form method="GET" id="category_form">
<input type="hidden" name="sort" value="$get('sort')">
<input type="hidden" name="order" value="$get('order')">
<select name='filter' id='filter'
    onchange="document.getElementById('category_form').submit()"
    title="$_('Filter on state')">
$for tab in filter_tabs:
    <option value="$tab.filter"
    $if tab.filter == get('filter'):
        selected
    >
    $tab.title
    </option>
</select>
<select name='category' id='category'
    onchange="document.getElementById('category_form').submit()"
    title="$_('Filter on Tracker')">
$for tab in category_tabs:
    <option value="$tab.category"
    $if tab.category == get('category'):
        selected
    >
    $tab.title
    </option>
</select>

    <input type="image" id='toolbar_refresh'
    src='/static/images/tango/view-refresh.png'
    title='$_('Refresh')'
    >

</form>