Summary:
There is a issue about passing the focus to unfocusable scroller.
To prevent the issue, check the status of focusable object and child object
before passing the focus.
Test Plan:
{F38439}
I changed the test file.
The problem occured as below.
1. click button
2. show popup
3. click cancel button in popup
4. lost the focus
Reviewers: Hermet, raster, cedric
Reviewed By: cedric
Subscribers: minkyu, sju27, cedric, jpeg
Differential Revision: https://phab.enlightenment.org/D4056
Signed-off-by: Cedric BAIL <cedric@osg.samsung.com>