Comment 3 for bug 1027946

I began to think about this some more and perhaps the best idea would be a tiny overlay in the corner of the screen with a progress bar. This would only be displayed if the transfer was initiated by the tray icon / indicator. If the user used a share box, then the progress would still be displayed there.

This is basically just an idea I am tossing around in my head, but it would definitely solve the problem if implemented properly.