Add filter to the attribute name label <td>

[ArthurThoby]

Motivations:

• other table fields are fully customizable thanks to the 'print_attribute_radio' function.
• overriding the override of the plugin is not a stable and satisfactory solution.

Potential use cases:

• add a button to the right of the name to open a size guide.
• enable a change in markup for the label itself (say you want to add js-classes to change the label on the fly depending on user interactions).
• others I did not think about.

Tested and works.