Qml Console view: Fix scrolling

Broken by qtbase commit 934f06220391eb0e0ebf66a2eb037f48adb4c43c

Change-Id: I55b1ae8636a1c1cf1ed75f4d03b58ebf5bba511a
Reviewed-by: Kai Koehne <kai.koehne@digia.com>

src/plugins/qmljstools/qmlconsoleview.cpp

@@ -124,6 +124,8 @@ QmlConsoleView::QmlConsoleView(QWidget *parent) :
     setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
     setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
     setVerticalScrollMode(QAbstractItemView::ScrollPerPixel);
+    horizontalScrollBar()->setSingleStep(20);
+    verticalScrollBar()->setSingleStep(20);
 
     connect(this, SIGNAL(activated(QModelIndex)), SLOT(onRowActivated(QModelIndex)));
 }