Quick task switch: back and forward

[Donato Marrazzo <donato marrazzo gmail com>]

I miss task bar to quickly switch between task just using mouse... and the activity dock is not as efficient. 
What do you think to add "back and forward" buttons in the top pad to navigate the "task history list"?
I'd like to work on it but I don't know where to start...

Cheers,
Donato