PoChecker: set IconOptions.AutoArrange to True for the ListView on GraphStat form.
(Windows and GTK2 AutoArrange always (probably a bug), so this only affected QT WS)

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@46317 4005530d-fff6-0310-9dd1-cebe43e6787f