[gitg] Consider putting the "vertical layout" control in the View menu

[Peter Eckersley <pde eff org>]

I really wanted this feature to work around terrible 16:9 screen ratios, but
didn't realise it was there because it wasn't where I expected it (ie, in the
View menu).

-- 
Peter Eckersley                            pde eff org
Technology Projects Director      Tel  +1 415 436 9333 x131
Electronic Frontier Foundation    Fax  +1 415 436 9993