IDEIntf: undeprecated TSourceEditorWindowInterface.SourceEditorIntfWithFilename and implemented it with avl tree

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41413 4005530d-fff6-0310-9dd1-cebe43e6787f
lcl: properly initialize keys for sorted lookup controls. Issue 23619

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41414 4005530d-fff6-0310-9dd1-cebe43e6787f