fix horizontal scrollbars with KDE oxygen style (bnc#722918)
fix horizontal scrollbars with KDE oxygen style (bnc#722918)

Apparently there are two style flags for detecting the widget
is horizontal.

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core