Use state handler for "From State" in Views to allow outputting of label instead of machine name

In the Views handler for "State" field:

 $data['workbench_moderation_node_history']['state'] = array(
    'title' => t('State'),
    'help' => t('Content moderation state of the node revisision.'),
    'filter' => array(
      'handler' => 'workbench_moderation_handler_filter_state',
    ),
    'field' => array(
      'handler' => 'workbench_moderation_handler_field_state',
      'click sortable' => TRUE,
    ),
    'sort' => array(
      'handler' => 'views_handler_sort',
    ),
    'argument' => array(
      'handler' => 'views_handler_argument_string',
      'name table' => 'workbench_moderation_states',
      'name field' => 'label',
    ),
  );

It uses the workbench_moderation_handler_field_state field handler which just allows ouputting of the label of instead of the machine name of the state.

The from state doesn't do this so it only shows the machine name

$data['workbench_moderation_node_history']['from_state'] = array(
    'title' => t('From state'),
    'help' => t('Previous content moderation state of the node revisision.'),
    'filter' => array(
      'handler' => 'workbench_moderation_handler_filter_state',
    ),
    'field' => array(
      'handler' => 'views_handler_field',
      'click sortable' => TRUE,
    ),
    'sort' => array(
      'handler' => 'views_handler_sort',
    ),
    'argument' => array(
      'handler' => 'views_handler_argument_string',
      'name table' => 'workbench_moderation_states',
      'name field' => 'label',
    ),
  );

I am making a View where it is more important for me to show the From State in list
I will attach a patch that fixes this.