D5181: API dox: fix missing note to call setXMLFile with KParts::MainWindow

[Friedrich W. H. Kossebau]

kossebau edited the summary of this revision.

REPOSITORY
  R306 KParts

REVISION DETAIL
  https://phabricator.kde.org/D5181

To: kossebau, dfaure, elvisangelaccio, #frameworks