ui: Refactored View initialization

* moved initView() implementation where used into constructor
* specify methods as override instead of virtual where applicable
* use default destructors where applicable

src/lib_gui/qt/view/QtGraphView.cpp

@@ -44,20 +44,9 @@ QtGraphView::QtGraphView(ViewLayout* viewLayout)
 	, m_scrollToTop(false)
 	, m_restoreScroll(false)
 	, m_isIndexedList(false)
-{
-}
-
-QtGraphView::~QtGraphView()
-{
-}
-
-void QtGraphView::createWidgetWrapper()
 {
 	setWidgetWrapper(std::make_shared<QtViewWidgetWrapper>(new QFrame()));
-}
 
-void QtGraphView::initView()
-{
 	QWidget* widget = QtViewWidgetWrapper::getWidgetOfView(this);
 
 	QBoxLayout* layout = new QBoxLayout(QBoxLayout::TopToBottom);
@@ -206,6 +195,10 @@ void QtGraphView::initView()
 	}
 }
 
+void QtGraphView::createWidgetWrapper()
+{
+}
+
 void QtGraphView::refreshView()
 {
 	m_onQtThread([this]()