Summary:
Focus region must be located in entry object.
Therefore if it get out of entry,
it just returns last cursor position that can be shown.
@fix
Test Plan:
1. elementary_test "Entry on Page Scroll"
2. click 2nd btn and close popup
3. page should not be scrolled
Reviewers: raster, herdsman, id213sin, woohyun, tasn, cedric
Subscribers: jpeg
Differential Revision: https://phab.enlightenment.org/D4072