[*] BO : add class on TD in standard List

Back office :
Add a class on TD in list created by getList()
In fields_list array of AdminController, we can add a new parameter('class')

example :
		'name' => array(
			'title' => $this->l('Name'),
			'width' => 150,
			'class' => 'ma_classe',
			'filter_key' => 'b!name'
		),
This parameter can be used for javascript effect, ...

Thanks.

admin-dev/themes/default/template/helpers/list/list_content.tpl

@@ -49,6 +49,7 @@
 					{/if}
 					class="{if !$no_link}pointer{/if}
 					{if isset($params.position) && $order_by == 'position'  && $order_way != 'DESC'} dragHandle{/if}
+					{if isset($params.class)} {$params.class}{/if}
 					{if isset($params.align)} {$params.align}{/if}"
 					{if (!isset($params.position) && !$no_link && !isset($params.remove_onclick))}
 						onclick="document.location = '{$current_index}&{$identifier}={$tr.$identifier}{if $view}&view{else}&update{/if}{$table}&token={$token}'">