Elementary: fix external icon set using standard icons
Elementary: fix external icon set using standard icons

Everytime a icon not on edje file is used (an standard icon),
an error was printed because it was trying to set it from
edje first.

Now it checks if the group exists on edje first.



SVN revision: 73543

rvandegrift/elementary,tasn/elementary,rvandegrift/elementary,FlorentRevest/Elementary,FlorentRevest/Elementary,tasn/elementary,tasn/elementary,tasn/elementary,FlorentRevest/Elementary,rvandegrift/elementary,rvandegrift/elementary,tasn/elementary,FlorentRevest/Elementary