message: Change image format support by thumbnail in file browser.
diff: @@ -947,11 +947,13 @@ QVariant FileTableModel::data(const QModelIndex & index, int role) const
  if (role == Qt::DecorationRole && column == FILE_COLUMN_NAME) {
  QIcon icon;
  + static QSet<QString> image_file_types = {"gif", "png", "jpg", "jpeg", "ico"};
  if (dirent.isDir()) {
  icon = dirent.readonly
  ? QIcon(":/images/files_v2/file_folder_readonly.png")
  : QIcon(":/images/files_v2/file_folder.png");
  - } else if (iconPrefixFromFileName(dirent.name) == "image") {
  + } else if (image_file_types.contains(QFileInfo(dirent.name).suffix().toLower())) {
  + // these format only supported by server.
  FileBrowserDialog *dialog =
  (FileBrowserDialog *)(QObject::parent());
  ThumbnailService *service = ThumbnailService::instance();
  