QWindowsMobileStyle::drawPrimitive(PE_Frame) background color fixed
QWindowsMobileStyle::drawPrimitive(PE_Frame) background color fixed

The background color of PE_Frame was palette().light() and has been
changed to use palette().background() now. This fixes the autotest
tst_QStyleSheetStyle::task188195_baseBackground for Windows mobile.

Reviewed-by: thartman

pruiz/wkhtmltopdf-qt,KDE/qt,radekp/qt,igor-sfdc/qt-wk,RLovelett/qt,pruiz/wkhtmltopdf-qt,igor-sfdc/qt-wk,igor-sfdc/qt-wk,igor-sfdc/qt-wk,igor-sfdc/qt-wk,RLovelett/qt,igor-sfdc/qt-wk,RLovelett/qt,radekp/qt,pruiz/wkhtmltopdf-qt,RLovelett/qt,pruiz/wkhtmltopdf-qt,radekp/qt,KDE/qt,radekp/qt,igor-sfdc/qt-wk,igor-sfdc/qt-wk,KDE/qt,pruiz/wkhtmltopdf-qt,pruiz/wkhtmltopdf-qt,pruiz/wkhtmltopdf-qt,pruiz/wkhtmltopdf-qt,KDE/qt,RLovelett/qt,radekp/qt,RLovelett/qt,RLovelett/qt,igor-sfdc/qt-wk,RLovelett/qt,KDE/qt,pruiz/wkhtmltopdf-qt,KDE/qt,radekp/qt,igor-sfdc/qt-wk,radekp/qt,radekp/qt,radekp/qt,RLovelett/qt,pruiz/wkhtmltopdf-qt,igor-sfdc/qt-wk,KDE/qt,RLovelett/qt,pruiz/wkhtmltopdf-qt,RLovelett/qt,KDE/qt,radekp/qt