test_focus3.c: refactoring.
test_focus3.c: refactoring.

1. use box instead of grid. grid is not flexible in most of cases for further changes.
2. move around code.
3. use frame and separator as well as box.

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