Switch to using an 'allowed view modes' logic instead of restricting view modes

Problem

media_wysiwyg_view_mode sub module enables us to restrict view mode options end-user can choose in the media dialog. We can select which type of file we want to restrict view modes and which view modes should be visible by end-users on page `admin/config/media/wysiwyg-view-mode`.

For example I want user can only select 'default', 'preview' view modes for image and tick those options on the page above. However when I go to the WYSIWYG, I cannot see these two options and see view mode 'wysiwyg' instead. I have dig into code and find it is implemented in a reverse logic.

function media_wysiwyg_view_mode_media_wysiwyg_wysiwyg_allowed_view_modes_alter(&$view_modes, &$file) {
  if (variable_get("media_wysiwyg_view_mode_{$file->type}_wysiwyg_restricted_view_modes_status", FALSE) == TRUE) {
    $restricted_view_modes = variable_get("media_wysiwyg_view_mode_{$file->type}_wysiwyg_restricted_view_modes", array());

    foreach ($restricted_view_modes as $restricted_view_mode) {
      if (array_key_exists($restricted_view_mode, $view_modes)) {
        unset($view_modes[$restricted_view_mode]);
      }
    }
  }
}

From the code I have found all selected view modes have been removed from view mode options.