elm_hoversel: reset alignment before calculation

elm_hoversel: reset alignment before calculation

Summary:
When screen is rotated, _resizing_eval() will be called twice by hover_parent
resize and hoversel movement.
If the alignment is changed to the right in the first call because of the geometry
of edje part is not updated yet (hoversel uses edje part geometry in calculation),
hoversel keeps being right-aligned in the second call,
even though there is enough space to show with default alignment.

Test Plan: elementary_test -to hoversel

Reviewers: cedric, jpeg

Differential Revision: https://phab.enlightenment.org/D4557

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