lcl: TControlScrollBar: fixed range check

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@45536 4005530d-fff6-0310-9dd1-cebe43e6787f
IDE: compiler options: other options: fixed dangling OnIdle, fixed thread accessing non thread safe methods

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@45538 4005530d-fff6-0310-9dd1-cebe43e6787f