ui: Improved user experience of error display

* label errors as errors instead of references in file snippet headers
* show number of fatal errors in file snippet headers as well
* only show the first 10 error snippets open, remaining collapsed
* don't show status message after parsing in red on errors
* don't show stats of parsing when project was only loaded

src/lib/Project.cpp

@@ -43,7 +43,7 @@ bool Project::load(const FilePath& projectSettingsFile)
 	{
 		m_storage->startParsing();
 		m_storage->finishParsing();
-		MessageFinishedParsing(0, 0, 0).dispatch();
+		MessageFinishedParsing(0, 0, 0, true).dispatch();
 	}
 	else
 	{