genlist: focus out by pressing "up" key when no item is selected
genlist: focus out by pressing "up" key when no item is selected

Summary:
move focus out of genlist by pressing "up" key when no item
is selected.

Test Plan: elementary_test -to fileselector

Reviewers: SanghyeonLee, cedric, Jaehyun_Cho, Hermet

Reviewed By: Hermet

Subscribers: Hermet

Differential Revision: https://phab.enlightenment.org/D3721

tasn/elementary,tasn/elementary,tasn/elementary,tasn/elementary,tasn/elementary