Convert RID_PAGE_OPTION_DBFIELD tabpage to .ui

Change-Id: I5ab4c42cf5467254423396ce4f56390fc2fb5276
Reviewed-on: https://gerrit.libreoffice.org/10920
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>