[Interest] Aligning QProgressBar inside a QSplashScreen

[Mandeep Sandhu]

>> Q_ASSERT just prints an assert information in debug
>
> Not really.
>
> Q_ASSERT, if it fails, calls qt_assert, which will abort the application with
> a core dump (SIGABRT) or, on Windows, call the debugger routines indicating
> failure.
>
> Q_ASSERTs are not survivable. If you trip one, the application terminates.

...and its a no-op if QT_NO_DEBUG is defined.

-mandeep