// menuItems can also just be a PopupMenu
// also, first of menuItems can be a Runnable for left-click on icon
static TrayIcon dm_systemTrayIcon(S imageID, S tooltip, O... menuItems) {
  TrayIcon tray = installTrayIcon(imageID, tooltip, menuItems);
  dm_ownResource(tempTrayIcon(tray));
  ret tray;
}