LCL, Translations unit: only copy item flags to new one when copying its content there. This prevents needless marking items as fuzzy e.g. in a case when one of, say, two duplicates is translated and marked as fuzzy and another one is translated too and NOT marked as fuzzy.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@46258 4005530d-fff6-0310-9dd1-cebe43e6787f