mime_types = ev_document_factory_get_mime_types (EV_BACKEND_COMICS);
file_filter_add_mime_list_and_free (filter, mime_types);
gtk_file_chooser_add_filter (GTK_FILE_CHOOSER (chooser), filter);
mime_types = ev_document_factory_get_mime_types (EV_BACKEND_COMICS);
file_filter_add_mime_list_and_free (filter, mime_types);
gtk_file_chooser_add_filter (GTK_FILE_CHOOSER (chooser), filter);