Fix Exif package directory

Signed-off-by: Sébastien MICHEL <michoux@gmail.com>
Change Activities order + Fix View/edit behavior

* To prevent issue on launcher automatic icon creation: Put gallery as
first activity

* To prevent View opened when Edit is asked by user added noHistory to
View.

Signed-off-by: Sébastien MICHEL <michoux@gmail.com>
Clean up activity workflow

Signed-off-by: Sébastien MICHEL <michoux@gmail.com>