[Development] QTabBar: Add ability to set background color per tab

[Viruca Gomes]

As was said in QtDD11 ( I think was Lars or Thiago ), "with Qt 5.0 it's
time to break binary compatibility"

What about this patch to be added to Qt 5?

https://bugreports.qt.nokia.com/browse/QTBUG-840

A review of some methods to allow derivation ( means adding virtual on
some of them ) must be done also for many classes in QWidget's
hierarchy.

Is there any plan to check bug reports / feature requests before Qt5 ?

Many thanks,

Jordi.