message: value is PROGMEM too....
diff: @@ -1186,7 +1186,7 @@ void WiFiManager::handleWifiSave() {
  page += FPSTR(HTTP_END);
  server->sendHeader(FPSTR(HTTP_HEAD_CL), String(page.length()));
  - server->sendHeader(FPSTR(HTTP_HEAD_CORS), HTTP_HEAD_CORS_ALLOW_ALL);
  + server->sendHeader(FPSTR(HTTP_HEAD_CORS), FPSTR(HTTP_HEAD_CORS_ALLOW_ALL));
  server->send(200, FPSTR(HTTP_HEAD_CT), page);
  DEBUG_WM(DEBUG_DEV,F("Sent wifi save page"));
  