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/component/controller/CodeController.cpp

@@ -314,7 +314,10 @@ void CodeController::handleMessage(MessageShowErrors* message)
 
 		std::sort(snippets.begin(), snippets.end(), CodeSnippetParams::sortById);
 
-		expandVisibleSnippets(&snippets, false);
+		if (view->isInListMode())
+		{
+			expandVisibleSnippets(&snippets, false);
+		}
 
 		CodeView::CodeParams params;
 		params.clearSnippets = true;

src/lib/component/controller/TooltipController.cpp

@@ -5,6 +5,7 @@
 #include "component/view/TooltipView.h"
 #include "data/access/StorageAccess.h"
 
+#include "utility/messaging/type/MessageActivateSourceLocations.h"
 #include "utility/scheduling/TaskDecoratorDelay.h"
 #include "utility/scheduling/TaskLambda.h"
 
@@ -83,7 +84,13 @@ void TooltipController::handleMessage(MessageTooltipShow* message)
 		TooltipInfo info = m_storageAccess->getTooltipInfoForSourceLocationIdsAndLocalSymbolIds(
 			message->sourceLocationIds, message->localSymbolIds);
 
-		if (info.snippets.size())
+		// If a tooltip list would only display one token, then just activate it instead.
+		// This can happen when edges pointing to the token use the same source location e.g. override edges
+		if (info.snippets.size() == 1)
+		{
+			MessageActivateSourceLocations(message->sourceLocationIds).dispatch();
+		}
+		else if (info.snippets.size())
 		{
 			getView()->showTooltip(info, getViewForOrigin(message->origin));
 

src/lib/utility/messaging/type/MessageTooltipShow.h

@@ -15,6 +15,7 @@ public:
 		, origin(origin)
 	{
 		setSendAsTask(false);
+		setIsLogged(false);
 	}
 
 	MessageTooltipShow(const std::vector<Id>& sourceLocationIds, const std::vector<Id>& localSymbolIds, TooltipOrigin origin)
@@ -23,6 +24,7 @@ public:
 		, origin(origin)
 	{
 		setSendAsTask(false);
+		setIsLogged(false);
 	}
 
 	static const std::string getStaticType()