elm.hoversel: revert unnecessary item expansion & get proper size

elm.hoversel: revert unnecessary item expansion & get proper size

Summary:
The changes of previous patch (4ea7effe70423b5f88f98aea45a96582669aa280)
are reverted, and item calculation is fixed correctly.
The main reason why hoversel item has wrong size in screen rotation is
that hover doesn't update geometry when the size of target object is changed.

Test Plan: elementary_test -to hoversel

Reviewers: cedric, jpeg

Differential Revision: https://phab.enlightenment.org/D4556

Signed-off-by: Cedric BAIL <cedric@osg.samsung.com>