when popup window in running, if main windows is clicked by user, the detecting will not work

[GalliumWang]

there is some bug with the code below

    // detection.ts
    const isBrowserActive = document.hasFocus() || handler.document.hasFocus()
    if (!isBrowserActive) {
      throw AlertMessage.FocusWindow
    }

    // Make test
    if (document.hasFocus()) {
      document.body.insertBefore(input, document.getElementById('app'))
    } else {
      handler.document.body.appendChild(input)
    }