Contacts.App: make the buttons as center vertically

http://bugzilla.gnome.org/show_bug.cgi?id=708858

Signed-off-by: Yosef Or Boczko <yoseforb@gmail.com>
Contacts.SetupWindow: make the buttons as center vertically

https://bugzilla.gnome.org/show_bug.cgi?id=708858

Signed-off-by: Yosef Or Boczko <yoseforb@gmail.com>