beaconLog(txtToSend, logLevel) {
    if (!logLevel) logLevel = "debug";
    navigator.sendBeacon("./_clientLog", "".concat(logLevel, "::").concat(txtToSend));
  }
Send log text to uibuilder's beacon endpoint (works even if socket.io not connected)
@param {string} txtToSend Text string to send
@param {string|undefined} logLevel Log level to use. If not supplied, will default to debug