genlist : arrange focus set in mouse up

genlist : arrange focus set in mouse up

Summary :
when mouse up happens, item must be focused, and after that,
select must be called.
current logic, focus is already called inside the select function
and again focus set is called in the end of mouse_up,
so if user new focused widget inside the select callback,
mouse_up forcely take the focus into the item again.
select callback should comes after the focus callback calls
to work properly.

Change-Id: I11401daecfa56c7036f23bc221796d81210966ee
Signed-off-by: SangHyeon Lee <sh10233.lee@samsung.com>