test_box: Remove unnecessary object resize.
test_box: Remove unnecessary object resize.

- Do not resize window's resize object manually.
- Do not resize box's children objects manually.

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