More replacing of show() with open()

This time on DockWidgetViewInterface

examples/dockwidgets/MyMainWindow.cpp

@@ -77,7 +77,7 @@ MyMainWindow::MyMainWindow(const QString &uniqueName, KDDockWidgets::MainWindowO
             QStringLiteral("new dock %1").arg(count));
         dock->setWidget(w);
         dock->resize(QSize(600, 600));
-        dock->show();
+        dock->open();
     });
 
     auto saveLayoutAction = fileMenu->addAction(QStringLiteral("Save Layout"));

examples/dockwidgets/main.cpp

@@ -429,7 +429,7 @@ int main(int argc, char **argv)
         dockableMainWindow->setWindowTitle("Dockable Main Window");
         dockableMainWindow->show();
         mainWindowDockWidget->setWidget(dockableMainWindow);
-        mainWindowDockWidget->show();
+        mainWindowDockWidget->open();
         mainWindowDockWidget->resize(QSize(800, 800));
     }