DockWidget ignore default size

[Daguerreo]

Default size seems to be ignored and docks placed always with the fair option.

   KDDockWidgets::MainWindow m{"main_window", KDDockWidgets::MainWindowOption_None};
   auto d1 = new KDDockWidgets::DockWidget("D1");
   auto d2 = new KDDockWidgets::DockWidget("D2");
   auto d3 = new KDDockWidgets::DockWidget("D3");
   m.addDockWidget(d1, KDDockWidgets::Location_OnLeft, nullptr, QSize(200, 600));
   m.addDockWidget(d2, KDDockWidgets::Location_OnRight);
   m.addDockWidget(d3, KDDockWidgets::Location_OnBottom);

   m.resize(1200, 800);
   m.show();

[iamsergio]

the preferred size is only honoured when inserting, so, if you insert d1 last, it should work

It gets very difficult to handle all the edge cases otherwise