Accessibility: add a title for weight selector

I had to solve this in template.php on a recent project:

// code
      foreach (element_children($form['field_order_selector']) as $key) {
        $form['field_order_selector'][$key]['weight']['#title'] = t('Select a numeric value to re-order.');
        $form['field_order_selector'][$key]['weight']['#title_display'] = 'invisible';
      }
//code

It would be great if this was handled in views_handler_weight_selector.inc:

     $form[$this->options['id']][$row_index]['weight'] = array(
        '#type' => 'select',
        '#title' => t('Select a numeric value to re-order'),
        '#title_display' => 'invisible',
        '#options' =>  $options,
        '#default_value' => $this->get_value($row),
        '#attributes' => array('class' => array('weight-selector')),
      );

Title is a bit long. Attaching a patch that addresses original issue.

Updating patch to be consistent with core output of 'row ordering' boxes.