pochecker: unselect all, select basic button, issue 26395, from Vaclav Valicek

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@45671 4005530d-fff6-0310-9dd1-cebe43e6787f
pochecker: buttons, issue 26395, from Vaclav Valicek

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@45672 4005530d-fff6-0310-9dd1-cebe43e6787f