IDE: editor file manager: dockable

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41969 4005530d-fff6-0310-9dd1-cebe43e6787f
Converter: correct file name for error message.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41970 4005530d-fff6-0310-9dd1-cebe43e6787f
Converter: implement the dummy source replacements using TSourceChangeCache.ReplaceEx. Fixes issue #23552

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41971 4005530d-fff6-0310-9dd1-cebe43e6787f