Fixes incorrect initial text shadow position in Aurorae. Unfortunately
QGraphicsDropShadowEffect seems to be not side effect free. Updates to the scene
are not propagated leaving the tabs in a wrong visual state. Therefore text shadow
is disabled for window tabbing. I will investigate further to see if it gets fixed
in Qt 4.7.
CCBUG: 248754
svn path=/trunk/KDE/kdebase/workspace/; revision=1169087