IDE: added TDesignerMediator.UseRTTIForMethods

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@40122 4005530d-fff6-0310-9dd1-cebe43e6787f
IDE: use TDesignerMediator.UseRTTIForMethods in create method

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@40123 4005530d-fff6-0310-9dd1-cebe43e6787f