ui: Fixes for upcoming release

* improved comment colors in all color schemes
* improved contrasts for dark color scheme
* fixed error locations stay visible when activating file in single file view
* removed scroll speed change listener from search autocompletion because it caused slowdown on macOS
* fixed bounding rects of graph edges to contain arrow
* fixed tooltip list shown with just one element

src/lib_gui/qt/element/QtAutocompletionList.cpp

@@ -361,9 +361,6 @@ QtAutocompletionList::QtAutocompletionList(QWidget* parent)
 	setModelSorting(QCompleter::UnsortedModel);
 	setCompletionPrefix("");
 	setMaxVisibleItems(8);
-
-	m_scrollSpeedChangeListenerHorizontal.setScrollBar(list->horizontalScrollBar());
-	m_scrollSpeedChangeListenerVertical.setScrollBar(list->verticalScrollBar());
 }
 
 QtAutocompletionList::~QtAutocompletionList()

src/lib_gui/qt/element/QtAutocompletionList.h

@@ -11,7 +11,6 @@
 
 #include "data/search/SearchMatch.h"
 #include "qt/utility/QtDeviceScaledPixmap.h"
-#include "qt/utility/QtScrollSpeedChangeListener.h"
 
 class QtAutocompletionModel
 	: public QAbstractTableModel
@@ -92,9 +91,6 @@ private slots:
 private:
 	std::shared_ptr<QtAutocompletionModel> m_model;
 	std::shared_ptr<QtAutocompletionDelegate> m_delegate;
-
-	QtScrollSpeedChangeListener m_scrollSpeedChangeListenerHorizontal;
-	QtScrollSpeedChangeListener m_scrollSpeedChangeListenerVertical;
 };
 
 #endif // QT_AUTOCOMPLETION_LIST

src/lib_gui/qt/graphics/QtLineItemAngled.cpp

@@ -18,6 +18,8 @@ QtLineItemAngled::~QtLineItemAngled()
 QPainterPath QtLineItemAngled::shape() const
 {
 	QPainterPath path;
+	path.setFillRule(Qt::WindingFill);
+
 	QPolygon poly = getPath();
 
 	for (int i = 0; i < poly.size() - 1; i++)
@@ -25,7 +27,7 @@ QPainterPath QtLineItemAngled::shape() const
 		path.addRect(QRectF(poly.at(i), poly.at(i + 1)).normalized().adjusted(-5, -5, 5, 5));
 	}
 
-	// path.addRect(getArrowBoundingRect(poly).adjusted(-3, -3, 3, 3));
+	path.addRect(getArrowBoundingRect(poly).adjusted(-3, -3, 3, 3));
 
 	return path;
 }
@@ -43,6 +45,7 @@ void QtLineItemAngled::paint(QPainter* painter, const QStyleOptionGraphicsItem*
 	path.moveTo(poly.at(i));
 
 
+	// debug: draw line path
 	// while (i > 0)
 	// {
 	// 	i--;
@@ -53,6 +56,12 @@ void QtLineItemAngled::paint(QPainter* painter, const QStyleOptionGraphicsItem*
 	// return;
 
 
+	// debug: draw bounding rects
+	// path = shape();
+	// painter->drawPath(path);
+	// return;
+
+
 	QRectF drawRect = options->exposedRect;
 	QRectF partRect;