When setting window size, take into account when menubar is not visible

Take into account menubar visibility when sizing a new window.
Note that this is only used when 'Use current window size on next
startup' is unchecked.

Thanks to Roman Gilg subdiff gmail com for patch

BUG: 359662
REVIEW: 27803

src/MainWindow.cpp

@@ -823,6 +823,8 @@ void MainWindow::showEvent(QShowEvent* aEvent)
         menuBar()->setVisible(_menuBarInitialVisibility);
         _toggleMenuBarAction->setChecked(_menuBarInitialVisibility);
         _menuBarInitialVisibilityApplied = true;
+        if(!KonsoleSettings::saveGeometryOnExit())
+            resize(sizeHint());
     }
 
     // Call parent method