and fix a very dubious field declared as

    css::uno::Reference< css::container::XNameContainer >&

in NamespaceItemDialog

Change-Id: Icae09704ceb94cc24b4333d76b3fe67fc61f568b
Reviewed-on: https://gerrit.libreoffice.org/46808Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>