1) restore previously deleted label which is actually used by the controller
2) put Manage Names dialog in same one-column as Define Name dialog.

Change-Id: Ia5e6d1cf183ba7e0dc5b43b964054caf2f187ed8
Reviewed-on: https://gerrit.libreoffice.org/15487Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com>