ui: Custom style for dock widget title bars

* avoid style loading in every view on application start
* improved contrast of reference label
* moved Reset Window Layout action up in View menu

src/lib_gui/qt/view/QtCodeView.cpp

@@ -14,7 +14,6 @@ QtCodeView::QtCodeView(ViewLayout* viewLayout)
 	: CodeView(viewLayout)
 {
 	m_widget = new QtCodeNavigator();
-	setStyleSheet();
 }
 
 QtCodeView::~QtCodeView()

src/lib_gui/qt/view/QtErrorView.cpp

@@ -180,8 +180,6 @@ void QtErrorView::initView()
 	checkboxes->addSpacing(10);
 
 	layout->addLayout(checkboxes);
-
-	setStyleSheet();
 }
 
 void QtErrorView::refreshView()

src/lib_gui/qt/view/QtGraphView.cpp

@@ -150,8 +150,6 @@ void QtGraphView::initView()
 		updateTrailButtons();
 		trailDepthChanged(0);
 	}
-
-	refreshView();
 }
 
 void QtGraphView::refreshView()

src/lib_gui/qt/view/QtRefreshView.cpp

@@ -9,7 +9,6 @@ QtRefreshView::QtRefreshView(ViewLayout* viewLayout)
 	: RefreshView(viewLayout)
 {
 	m_widget = new QtRefreshBar();
-	setStyleSheet();
 }
 
 QtRefreshView::~QtRefreshView()

src/lib_gui/qt/view/QtSearchView.cpp

@@ -11,7 +11,6 @@ QtSearchView::QtSearchView(ViewLayout* viewLayout)
 	: SearchView(viewLayout)
 {
 	m_widget = new QtSearchBar();
-	setStyleSheet();
 }
 
 QtSearchView::~QtSearchView()

src/lib_gui/qt/view/QtStatusView.cpp

@@ -74,8 +74,6 @@ void QtStatusView::initView()
 	filters->addSpacing(10);
 
 	layout->addLayout(filters);
-
-	refreshView();
 }
 
 void QtStatusView::refreshView()

src/lib_gui/qt/view/QtUndoRedoView.cpp

@@ -9,7 +9,6 @@ QtUndoRedoView::QtUndoRedoView(ViewLayout* viewLayout)
 	: UndoRedoView(viewLayout)
 {
 	m_widget = new QtUndoRedo();
-	setStyleSheet();
 }
 
 QtUndoRedoView::~QtUndoRedoView()