It does not appear a confirmation dialog when deleting

It does not appear a confirmation dialog when deleting.

```
<%= link_to(l(:button_delete),
               {:action => 'destroy', :id => @view_customize.id},
               :confirm => l(:text_are_you_sure), :method => :delete,
               :class => 'icon icon-del') %>
```

Confirm option is disabled on Rails 4.1.
