Property name localization is only useful if the
strings are meant to be used in a user interface,
such as is the case with WebSettings, or for
graphical interface builders, which are not of
our concern, since we don't use Glade and friends
and nobody else is going to use our widgets.
In short, make translation work much easier.
Finally the trash, which was the last item that
needed to be implemented as an action, is an
action, a KatzeArrayAction to be exact.
This simplifies more code and also makes Window
and RecentlyVisited generically implementable.
Incidentally this change also fixes a bug where
the browser tried to add a new tab when the last
one was closed, even while destroying itself.
Furthermore sokoke_image_menu_item_ellipsized
and sokoke_widget_popup were promoted to Katze.
We're still keeping the old functions for now.
