PoChecker: Do not select all tests by according checkbox, but only "basic" ones. Do not include search for duplicate strings to this selection as it tends to confuse translators most of the time and usually used only by developers.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@39796 4005530d-fff6-0310-9dd1-cebe43e6787f