Reinitialize tray icon if taskbar/explorer dies and comes back

[henkman]

If explorer dies and comes back to life the icon is not visible because that is not expected. Currently you have to restart virgo. Would be nice to detect if the taskbar is gone and create the icon again.

[xiaokaixuan]

I solved the problem. It can automatically create the icon, when the explorer restart.

[henkman]

That's good to hear. Open a pull request so I can merge your changes.

[xiaokaixuan]

I had opened a pull request. You can merge my changes now.

[henkman]

After using virgo for quite some time now I think the issue with a dying explorer is negligible and the additional complexity to fix it not worth it. I want to keep this a simple as possible and appreciate your helping out but I will not merge the change