if true all text-items which have only white characters (with new lines as well)
will be deleted
this not actually delete the whole item but only the string
the item will be present with an empty string
default: false
git-svn-id: svn://ttmath.org/publicrep/ezc/trunk@260 e52654a7-88a9-db11-a3e9-0013d4bc506e