some work on the save-modified-files logic. We no longer rely

on QFileInfo to tell us that a file is not writable, but accept
that the attempt to save a file might actually fail (:-) ). This
solves the NT network domain issue without the insane slowness.

The stuff needs more work. We do not have any UI for failing save
operations when closing creator (other than it doesn't close). Bad.

src/plugins/coreplugin/filemanager.cpp

@@ -394,6 +394,7 @@ QList<IFile *> FileManager::saveModifiedFiles(const QList<IFile *> &files,
                 if (!fileName.isEmpty()) {
                     blockFileChange(file);
                     ok = file->save(fileName);
+                    file->checkPermissions();
                     unblockFileChange(file);
                 }
                 if (!ok)