Qt: do not allow negative client rect.


git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@45141 4005530d-fff6-0310-9dd1-cebe43e6787f
IDE: msg window: hint why a package was compiled

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@45142 4005530d-fff6-0310-9dd1-cebe43e6787f