message: Support "minimize to tray" from the window decorations.
diff: @@ -636,7 +636,7 @@ function handleIpc(event: Electron.Event, arg: any): void {
  break;
  case Messages.MessageType.WINDOW_MINIMIZE_REQUEST:
  - mainWindow.minimize();
  + minimizeAllWindows();
  break;
  case Messages.MessageType.WINDOW_MAXIMIZE_REQUEST:
  