Remove any remaining Oxygen style workarounds

src/lib/app/browserwindow.cpp

@@ -432,13 +432,6 @@ void BrowserWindow::setupUi()
 #endif
     }
 
-    // Workaround for Oxygen tooltips not having transparent background
-    QPalette pal = QToolTip::palette();
-    QColor col = pal.window().color();
-    col.setAlpha(0);
-    pal.setColor(QPalette::Window, col);
-    QToolTip::setPalette(pal);
-
     restoreUiState(uiState);
 
     // Set some sane minimum width

src/lib/app/proxystyle.cpp

@@ -55,12 +55,7 @@ int ProxyStyle::pixelMetric(PixelMetric metric, const QStyleOption* option, cons
     case PM_TabBarTabHSpace:
         if (m_TabBarTabHSpace == -1) {
             m_TabBarTabHSpace = qMin(QProxyStyle::pixelMetric(PM_TabBarTabHSpace, option, widget), 14);
-
-            if (name() == QLatin1String("oxygen")) {
-                m_TabBarTabHSpace = 14;
-            }
         }
-
         return m_TabBarTabHSpace;
 
     default:

src/lib/navigation/locationbar.cpp

@@ -55,7 +55,7 @@ LocationBar::LocationBar(QWidget *parent)
     setObjectName("locationbar");
     setDragEnabled(true);
 
-    // Disable Oxygen QLineEdit transitions, it breaks with setText() && home()
+    // Disable KDE QLineEdit transitions, it breaks with setText() && home()
     setProperty("_kde_no_animations", QVariant(true));
 
     m_bookmarkIcon = new BookmarksIcon(this);

src/lib/other/statusbar.cpp

@@ -135,16 +135,6 @@ void TipLabel::hideDelayed()
     m_timer->start();
 }
 
-void TipLabel::resizeEvent(QResizeEvent* ev)
-{
-    SqueezeLabelV1::resizeEvent(ev);
-
-    // Oxygen is setting rounded corners only for top-level tooltips
-    if (mApp->styleName() == QLatin1String("oxygen")) {
-        setMask(QzTools::roundedRect(rect(), 4));
-    }
-}
-
 void TipLabel::paintEvent(QPaintEvent* ev)
 {
     QStylePainter p(this);

src/lib/other/statusbar.h

@@ -39,7 +39,6 @@ public:
     bool eventFilter(QObject* o, QEvent* e);
 
 private:
-    void resizeEvent(QResizeEvent* ev);
     void paintEvent(QPaintEvent* ev);
 
     QTimer* m_timer;

src/lib/tabwidget/combotabbar.cpp

@@ -531,12 +531,6 @@ void ComboTabBar::setUpLayout()
         height = qMax(m_mainTabBar->sizeHint().height(), m_pinnedTabBar->sizeHint().height());
     }
 
-    // Workaround for Oxygen theme. For some reason, QTabBar::height() returns bigger
-    // height than it actually should.
-    if (mApp->styleName() == QLatin1String("oxygen")) {
-        height -= 4;
-    }
-
     // We need to setup heights even before m_mainTabBar->height() has correct value
     // So lets just set minimum 5px height
     height = qMax(5, height);