Multi-row tabs in QTabWidget

When users opens many tabs, the tab bar becomes unusable, see the attached screenshots.

Tabs are too small in horizontal tab style and in vertical, and text is not visible. If we set minimum tab width, we can't show all tabs in screen, tab scroll buttons not comfortable to use.

For solve this issue other apps use multi-row tabs, that can show all opened tabs with good lookup.
Here is examples from other apps:
Visual Studio: http://www.c-sharpcorner.com/UploadFile/ReviewImages/11272009103149AM/Tabs%20Studio%20in%20Visual%20Studio%202008.png
Windows: http://www.computerfreetips.com/images/performance-settings.gif
Firefox: http://lh6.ggpht.com/_xvqZvwoH9PI/SzLOE3mIk4I/AAAAAAAAPeE/ba5iQ4VrYGQ/multi_row_tabs.jpg
QIP: http://images3.download.ru/images/reviews/qip.jpg

And many other examples.

At now QT don't have the way to do milti-row tabs, but this is very useful for developers.

Some of them do the patches, for example NTabWidget http://www.qtforum.org/article/28672/how-to-change-qtabwidget-s-tab-positon.html
Other do the plugins, for example in Kate: http://kate-editor.org/2011/04/25/kates-tab-bar-plugins/

So, will be much better if QT release this feature in core!