RID_SVX_XFORMS_TABPAGES conversion to .ui

Change-Id: I0f3647e95b2150eb8753aa333eeb492fee76bd2a
Reviewed-on: https://gerrit.libreoffice.org/10192
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>