VerticalTabs: Set Qt::NoFocus policy

Fixes some styles painting unwanted focus indicator.

src/plugins/VerticalTabs/tablistview.cpp

@@ -35,6 +35,7 @@ TabListView::TabListView(QWidget *parent)
     setDropIndicatorShown(true);
     setMouseTracking(true);
     setFlow(QListView::LeftToRight);
+    setFocusPolicy(Qt::NoFocus);
     setFrameShape(QFrame::NoFrame);
     setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
     setHorizontalScrollMode(QAbstractItemView::ScrollPerPixel);

src/plugins/VerticalTabs/tabtreeview.cpp

@@ -37,6 +37,7 @@ TabTreeView::TabTreeView(QWidget *parent)
     setDropIndicatorShown(true);
     setAllColumnsShowFocus(true);
     setMouseTracking(true);
+    setFocusPolicy(Qt::NoFocus);
     setFrameShape(QFrame::NoFrame);
     setVerticalScrollMode(QAbstractItemView::ScrollPerPixel);
     setIndentation(0);