Converter: move Application.ProcessMessages to better places.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41701 4005530d-fff6-0310-9dd1-cebe43e6787f
Converter: improve log message for adding "SimplePanel = False" to StatusBar.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41702 4005530d-fff6-0310-9dd1-cebe43e6787f