[Bug 34645] Mac driver doesn't support systray notification bubble windows

https://bugs.winehq.org/show_bug.cgi?id=34645

[e-mail] changed:

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--- Comment #5 from [e-mail] ---
A problem with using the NSUserNotificationCenter API for this is that there's
no customization of the app icon. You could customize the app icon in the dock,
but not in the notification center. This means that the executable's info.plist
must point to a valid icon.

Plus, it's only available on 10.8. But you could use some kind of #ifdef, I
guess