Fix minor esthetic issue in users qml example

Change-Id: I405f546d106c333aa110028838adf7eebb42ef7d
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@digia.com>
Add missing metatype registrations

Change-Id: I0f2ade47382ba75a956cb8659e7f027346625707
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@digia.com>