message: Fixes
  Psk placeholder should not show if no psk is saved
diff: @@ -1222,9 +1222,13 @@ void WiFiManager::handleWifi(boolean scan) {
  if(_showPassword){
  pitem.replace(FPSTR(T_p), WiFi_psk());
  }
  - else {
  + else if(WiFi_psk() != ""){
  pitem.replace(FPSTR(T_p),FPSTR(S_passph));
  }
  + else {
  + pitem.replace(FPSTR(T_p),"");
  + }
  +
  page += pitem;
  page += getStaticOut();
  