Add the column definition method

[lenybernard]

@thomasbeaujean created a part of code to define the colmuns directly in the service, we should use it and add the code in the view to generate automatically the list.
No more need to override the default view. Bipbip 👍

PHP :

/**
 * Get column definition
 *
 * @param string  $id         The name of the column of the function of the object
 * @param string  $filter     The name of the filter
 * @param string  $labelId    The id of the label
 * @param boolean $sortable   Can this column be sorted
 * @param string  $sortableId The identifier of the sort
 *
 * @return array The array of a column definition
 */
public function getColumnDefinition($id, $filter = null, $labelId = null, $sortable = false, $sortableId = null)
{
    //by default the id is used for the column label
    if ($labelId === null) {
        $labelId = $id;
    }
    //if sortable, then sortableId is mandatory
    if ($sortable === true) {
        if ($sortableId === null) {
            throw new \Exception('The column '.$id.' is sortable but has no $sortableId defined');
        }
    }
    $column = array(
        'id' => $id,
        'filter' => $filter,
        'label' => $this->getLabelPrefix().$labelId,
        'sortable' => $sortable,
        'sortable_id' => $sortableId
    );
    return $column;
}

html.twig

{% for column in extra.columns %}
    {% if column.sortable %}
    <th class="sortable" data-filter="{{ column.sortable_id }}">{{ column.label|trans }}</th>
    {% else %}
    <th>{{ column.label|trans }}</th>
    {% endif %}
{% endfor %}

We should be able to add a closure to render a column value and define a default column rendering.