use popup menu in view space bar

Unfortuantely, the Oxygen (frameworks 5) style paints the "down"
arrow for a QToolButton without text behind the icon, which looks
wrong: http://wstaw.org/m/2014/01/23/plasma-desktopWX2364.png

Can we do anything about it? :-)
CCMAIL: hugo.pereira@free.fr