IDEIntf: clean up

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@40657 4005530d-fff6-0310-9dd1-cebe43e6787f
IDE: fixed crash on closing package graph

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@40658 4005530d-fff6-0310-9dd1-cebe43e6787f