test_popup.c: added popup example which has a rectangle as its parent.
test_popup.c: added popup example which has a rectangle as its parent.

This shows how the popup and its block event area size are decided.

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