Summary:
changed events should always send the related data when possible
ref T7708
Depends on D9789
Reviewers: segfaultxavi
Reviewed By: segfaultxavi
Subscribers: segfaultxavi, cedric, #reviewers, #committers
Tags: #efl_widgets
Maniphest Tasks: T7708
Differential Revision: https://phab.enlightenment.org/D9790