handle lgc.adbh api changes within regards of backup/restore: * new backup_commands method instead of backup_command * some backend still return command as string as expected by os.system, not subprocess.call

function set_tab(tabname, cookiename) {
    // set appropriate cookie
    asyncRemoteExec('set_cookie', cookiename, tabname);
    // trigger show + tabname event
    trigger_load(tabname);
}