Anchordocking: fix an Access Violation when closing the IDE.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41899 4005530d-fff6-0310-9dd1-cebe43e6787f
IDE: Testing and tweaking component list.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41900 4005530d-fff6-0310-9dd1-cebe43e6787f