Fix hildon_touch_selector_get_last_activated_row ()
Fix hildon_touch_selector_get_last_activated_row ()

Fix another public method that is not properly hidding the
GtkTreeModelFilter. Reported by Jan-Arne Petersen.

community-ssu/hildon,archlinuxarm-n900/libhildon,archlinuxarm-n900/libhildon,community-ssu/hildon,community-ssu/hildon,archlinuxarm-n900/libhildon