[Usability] Minor wording change to the HIG

[Corey Burger <corey burger gmail com>]

In
http://developer.gnome.org/projects/gup/hig/2.0/input-keyboard.html#standard-shortcuts

It says:

PageUp, Ctrl-PageUp, PageDown, Ctrl-PageDown	Scroll selected view by
one page up/left/down/right

However it makes not mention of a common usage of Ctrl+PageUp|Down,
which is switching tabs.

Did I miss something somewhere else or do we need to add another
section to the hig telling people which keys they should use for tab
switching?

Here is a current survey of apps

Epip  - C-pd|u and c-alt-pg|u
Gedit - c-a-pd|u
gnome-terminal - c-pd|u

Cheers,

Corey