Port from deprecated QPalette::background() > QPalette::window()

Signed-off-by: Juraj Oravec <sgd.orava@gmail.com>

src/lib/webengine/webscrollbar.cpp

@@ -88,6 +88,6 @@ void WebScrollBar::performScroll()
 void WebScrollBar::paintEvent(QPaintEvent *ev)
 {
     QPainter painter(this);
-    painter.fillRect(ev->rect(), palette().background());
+    painter.fillRect(ev->rect(), palette().window());
     QScrollBar::paintEvent(ev);
 }

src/lib/webengine/webscrollbarmanager.cpp

@@ -58,15 +58,13 @@ public:
 private:
     void paintEvent(QPaintEvent *ev) override
     {
-        Q_UNUSED(ev)
-
         QStyleOption option;
         option.initFrom(this);
         option.rect = rect();
 
         QPainter p(this);
         if (mApp->styleName() == QL1S("breeze")) {
-            p.fillRect(ev->rect(), option.palette.background());
+            p.fillRect(ev->rect(), option.palette.window());
         } else {
             style()->drawPrimitive(QStyle::PE_PanelScrollAreaCorner, &option, &p, this);
         }