elm_entry: fix a bug in moving the magnifier

elm_entry: fix a bug in moving the magnifier

Summary:
When moving the magnifier in elm_entry, _magnifier_move
function occured infinite loop problem by calling
evas_object_move twice with different positions.
So, I changed it to call evas_object_move once.

ref T7202

Test Plan:
1. Set profile to "mobile"
2. elementary_test
3. entry
4. long press mouse button on elm_entry
5. when the magnifier is shown, try to move it

Reviewers: zmike, bu5hm4n, bowonryu, id213sin

Reviewed By: zmike

Subscribers: cedric, #reviewers, #committers

Tags: #efl

Maniphest Tasks: T7202

Differential Revision: https://phab.enlightenment.org/D8462