ibar: Changed the key which is used to store IBar Icons.
ibar: Changed the key which is used to store IBar Icons.

Summary:
Changed the key to orig_path, cause this is used to decided if something
is a duplicated entry in e_orders or not.

Reviewers: zmike

Subscribers: cedric

Differential Revision: https://phab.enlightenment.org/D1684

tasn/enlightenment,rvandegrift/e,tizenorg/platform.upstream.enlightenment,tizenorg/platform.upstream.enlightenment,tizenorg/platform.upstream.enlightenment,tasn/enlightenment,FlorentRevest/Enlightenment,rvandegrift/e,FlorentRevest/Enlightenment,FlorentRevest/Enlightenment,rvandegrift/e,tasn/enlightenment