On the X/Y Error Bars window a custom text is
set for a radiobutton if the chart has its own data table.
The difference is explained in the help, let's display the
correct description in the extended help.
Change-Id: Idaa6038818bc4f87ea490a457e7c96ff741f1f77
Reviewed-on: https://gerrit.libreoffice.org/38240
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Katarina Behrens <Katarina.Behrens@cib.de>