opt-out non-javascript support

in issue #354867: SEO: Add Canonical Tags to Quicktab Pages there is a feature request about not supporting browsers without javascript, which would solve the SEO problem.

here is the required code change:
/plugins/QuickQuicktabs.inc

function construct_link_options
...
    $query = array();
    if (variable_get('quicktabs_support_no_js', TRUE) {
      // Need to construct the correct querystring for the tab links.
      $query = drupal_get_query_parameters(NULL, array("qt-$qt_name", 'q', 'page'));
      $query["qt-{$qt_name}"] = $tabkey;
    }
...

there should be an "admin/structure/quicktabs/settings" page where this new variable quicktabs_support_no_js could be changed. Simple system_settings_form, something like:

function quicktabs_admin_settings() {
  $form['quicktabs_support_no_js'] = array(
    '#type' => 'checkbox',
    '#title' => t('Support browsers without JavaScript'),
    '#description' => t('Nice explanation what happens when this checkbox is enabled/disabled. SEO problem, etc..'),
    '#default_value' => variable_get('quicktabs_support_no_js', TRUE),
  );

  return system_settings_form($form);
}