LCL: Fix fOnAfterFilter event's name in FilterEdit

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41104 4005530d-fff6-0310-9dd1-cebe43e6787f
IDE: improve ExampleManager's GUI and logic.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41105 4005530d-fff6-0310-9dd1-cebe43e6787f