ios: fix deploystep displayName updating

still uses the default deploystepconfiguration, which gives some
artifacts (to be fixed later)

Change-Id: I3f4f8a71fbe4e18fc171aee571da72da1c9735db
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>
Wizards: Use configured extensions for c++ sources and headers

Task-number: QTCREATORBUG-12309
Change-Id: I3d6ebe84408427b5a4e499a6d38ef5f37711610e
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>