also important to have a familliar binding, but Alt+Tab is not as good as Alt+Esc
so Tab can not cycle we use Esc, and Esc can not cycle because of why we use Esc in the first place
we use Esc because Esc closes the menu, which also means if you press Alt+Esc while menu is open it will close - effect of toggle
in the end our binding has just one line, just one call to awful.menu.clients!
otherwise we would have to toggle the menu our selves
this is not official, this is my solution to the usability problem